diff --git a/mindinsight/ui/src/mixins/common-graph.vue b/mindinsight/ui/src/mixins/common-graph.vue
index 91055074..ff4f2681 100644
--- a/mindinsight/ui/src/mixins/common-graph.vue
+++ b/mindinsight/ui/src/mixins/common-graph.vue
@@ -22,33 +22,83 @@ const d3 = {select, selectAll, zoom};
 export default {
   data() {
     return {
+      graph: {
+        dom: Object,
+        size: Object, // When scale = 1
+        transform: Object,
+        minScale: Number,
+        defaultPadding: 4,
+      }, // Basic information about graph0 in svg
+      svg: {
+        size: Object,
+      },
+      graphviz: null,
+      graphvizTemp: null,
+      scaleRange: [0.001, 10], // graph zooms in and zooms out.
       clickScope: {}, // Information about the node that is clicked for the first time.
       frameSpace: 25, // Distance between the namespace border and the internal node
       curColorIndex: 0,
       totalMemory: 16777216 * 2, // Memory size of the graph plug-in
-      viewBox: {
-        max: 10000,
-        scale: {x: 1, y: 1},
-      },
+      allGraphData: {}, // graph Original input data
+      firstFloorNodes: [], // ID array of the first layer node.
+      nodesCountLimit: 4500, // Maximum number of sub-nodes in a namespace.
+      maxChainNum: 70,
+      graphContainer: null,
+      resizeDelay: 500, // The delay of resize's event
     };
   },
+  mounted() {
+    this.$nextTick(() => {
+      // Generate the dom of the submap.
+      if (!d3.select('#graphTemp').size()) {
+        d3.select('body').append('div').attr('id', 'graphTemp');
+      }
+      // Stores the dom of all the sorted subgraphs.
+      if (!d3.select('#subgraphTemp').size()) {
+        d3.select('body').append('div').attr('id', 'subgraphTemp');
+      }
+
+      this.graphContainer = document.querySelector('#graph');
+      if (this.graphContainer) {
+        this.graphContainer.addEventListener('click', this.controlEvent.bind(null, 'click'));
+        this.graphContainer.addEventListener('dblclick', this.controlEvent.bind(null, 'dblclick'));
+      }
+    });
+  },
   methods: {
+    /**
+     * Handles and executes click and double-click events
+     * @param {String} type Event type
+     * @param {Object} event Event data
+     */
+    controlEvent(type, event) {
+      if (!event) return;
+      const path = Array.from(event.path || (event.composedPath && event.composedPath()) || []);
+      let target;
+      for (let i = 0; i < path.length; i++) {
+        const classList = path[i].classList;
+        if (classList && classList.contains('node')) {
+          target = path[i];
+          break;
+        }
+      }
+
+      if (target) {
+        if (type === 'click') {
+          this.clickEvent(target, 'graph');
+        } else {
+          this.dblclickEvent(target, 'graph');
+        }
+      }
+    },
     /**
      * Initializing the click event
      * @param {Object} target The target of the click event
-     * @param {Number} index Index of the target
-     * @param {Array} nodesList List of nodes on the page
      * @param {String} pageKey Page identification mark
      */
-    clickEvent(target, index, nodesList, pageKey) {
-      // The target value of the element converted from the HTML attribute of the variable is null.
-      const event = currentEvent;
-      event.stopPropagation();
-      event.preventDefault();
-
-      const clickNode = nodesList[index];
-      const nodeId = clickNode.id;
-      const nodeClass = clickNode.classList.value;
+    clickEvent(target, pageKey) {
+      const nodeId = target.id;
+      const nodeClass = target.classList.value;
       setTimeout(() => {
         this.clickScope = {
           id: nodeId,
@@ -69,20 +119,11 @@ export default {
     /**
      * Initializing the click event
      * @param {Object} target The target of the click event
-     * @param {Number} index Index of the target
-     * @param {Array} nodesList List of nodes on the page
      * @param {String} pageKey Page identification mark
      */
-    dblclickEvent(target, index, nodesList, pageKey) {
-      // The target of the element converted from the HTML attribute of the variable is empty and
-      // needs to be manually encapsulated.
-      const event = currentEvent;
-      event.stopPropagation();
-      event.preventDefault();
-
-      const clickNode = nodesList[index];
-      const nodeId = clickNode.id;
-      const nodeClass = clickNode.classList.value;
+    dblclickEvent(target, pageKey) {
+      const nodeId = target.id;
+      const nodeClass = target.classList.value;
       let name = nodeId;
       this.selectedNode.more =
         name.indexOf('more...') !== -1 &&
@@ -147,61 +188,64 @@ export default {
             .zoomScaleExtent(this.scaleRange)
             .dot(dot)
             .attributer(this.attributer)
-            .render(() => {
-              this.initSvg(true);
-              this.afterInitGraph();
-            });
+            .render(this.afterInitGraph);
       } catch (error) {
         const svg = document.querySelector('#graph svg');
-        if (svg) {
-          svg.remove();
-        }
+        if (svg) svg.remove();
         this.initGraph(dot);
       }
-
-      // Generate the dom of the submap.
-      if (!d3.select('#graphTemp').size()) {
-        d3.select('body').append('div').attr('id', 'graphTemp');
-      }
-      // Stores the dom of all the sorted subgraphs.
-      if (!d3.select('#subgraphTemp').size()) {
-        d3.select('body').append('div').attr('id', 'subgraphTemp');
-      }
     },
     /**
-     * Initialize svg
-     * @param {Bealoon} setSize Weather to set svg origin width and height
+     * Add the location attribute to each node to facilitate the obtaining of node location parameters.
      */
-    initSvg(setSize) {
-      this.svg.dom = document.querySelector('#graph svg');
-      this.svg.rect = this.svg.dom.getBoundingClientRect();
-      const viewBoxData = this.svg.dom.getAttribute('viewBox').split(' ');
-      this.viewBox.scale.x = 1;
-      if (setSize) {
-        this.svg.originSize = {width: viewBoxData[2], height: viewBoxData[3]};
-      }
-      if (viewBoxData[2] > this.viewBox.max) {
-        this.viewBox.scale.x = viewBoxData[2] / this.viewBox.max;
-        viewBoxData[2] = this.viewBox.max;
-      }
+    afterInitGraph() {
+      const svg = document.querySelector('#graph svg');
+      if (svg) svg.removeAttribute('viewBox');
 
-      this.viewBox.scale.y = 1;
-      if (viewBoxData[3] > this.viewBox.max) {
-        this.viewBox.scale.y = viewBoxData[3] / this.viewBox.max;
-        viewBoxData[3] = this.viewBox.max;
-      }
-      this.svg.dom.setAttribute('viewBox', viewBoxData.join(' '));
-      this.svg.viewWidth = viewBoxData[2];
-      this.svg.viewHeight = viewBoxData[3];
+      setTimeout(() => {
+        const keys = ['_data', '_dictionary'];
+        if (this.graphviz) {
+          for (const key of keys) {
+            this.graphviz[key] = null;
+          }
+          this.graphviz = null;
+        }
+
+        if (this.graphvizTemp) {
+          for (const key of keys) {
+            this.graphvizTemp[key] = null;
+          }
+          this.graphvizTemp = null;
+        }
+      }, 100);
+
+      this.fitGraph('graph');
+      this.transplantChildrenDom();
+      const tempSvg = document.querySelector('#subgraphTemp svg');
+      if (tempSvg) tempSvg.remove();
+
+      const elements = Array.from(d3.select('#graph').selectAll('g.node, g.edge').nodes());
+      elements.forEach((ele) => {
+        if (!ele.hasAttribute('transform')) {
+          ele.setAttribute('transform', 'translate(0,0)');
+        }
+        // The title value needs to be manually set for the virtual node.
+        if (Array.prototype.includes.call(ele.classList, 'plain')) {
+          const title = ele.querySelector('title');
+          title.textContent = title.textContent.split('^')[0];
+        }
+      });
+      d3.selectAll('g.edge>title').remove();
+      d3.select('#graph g#graph0 title').remove();
+
+      this.startApp();
     },
     /**
      * Initializing the graph zoom
      * @param {String} pageKey
      */
     initZooming(pageKey) {
-      const graphBox = this.graph.dom.getBBox();
-      const padding = 4;
-      const minDistance = 20;
+      const minDistance = 100;
       const pointer = {start: {x: 0, y: 0}, end: {x: 0, y: 0}};
       const zoom = d3
           .zoom()
@@ -222,45 +266,13 @@ export default {
             let tempStr = '';
             let change = {};
             let scale = transformData.scale[0];
-            const graphRect = this.graph.dom.getBoundingClientRect();
-            const transRate = graphBox.width / graphRect.width;
             if (event.type === 'mousemove') {
               pointer.end.x = event.x;
               pointer.end.y = event.y;
-              let tempX = pointer.end.x - pointer.start.x;
-              let tempY = pointer.end.y - pointer.start.y;
-              const paddingTrans = Math.max(
-                  (padding / transRate) / scale,
-                  minDistance,
-              );
-              if (
-                graphRect.left + paddingTrans + tempX >=
-              this.svg.rect.left + this.svg.rect.width
-              ) {
-                tempX = Math.min(tempX, 0);
-              }
-              if (
-                graphRect.left + graphRect.width - paddingTrans + tempX <=
-              this.svg.rect.left
-              ) {
-                tempX = Math.max(tempX, 0);
-              }
-              if (
-                graphRect.top + paddingTrans + tempY >=
-              this.svg.rect.top + this.svg.rect.height
-              ) {
-                tempY = Math.min(tempY, 0);
-              }
-              if (
-                graphRect.top + graphRect.height - paddingTrans + tempY <=
-              this.svg.rect.top
-              ) {
-                tempY = Math.max(tempY, 0);
-              }
 
               change = {
-                x: tempX * transRate * scale,
-                y: tempY * transRate * scale,
+                x: pointer.end.x - pointer.start.x,
+                y: pointer.end.y - pointer.start.y,
               };
               pointer.start.x = pointer.end.x;
               pointer.start.y = pointer.end.y;
@@ -276,12 +288,12 @@ export default {
               scale = Math.min(this.scaleRange[1], scale);
               change = {
                 x:
-                (graphRect.x + padding / transRate - event.x) *
-                transRate *
+                ((this.svg.size.left - this.graph.defaultPadding - event.x + this.graph.transform.x) /
+                  transformData.scale[0]) *
                 (scale - transformData.scale[0]),
                 y:
-                (graphRect.bottom - padding / transRate - event.y) *
-                transRate *
+                ((this.svg.size.top + this.graph.transform.y - this.graph.defaultPadding - event.y) /
+                  transformData.scale[0]) *
                 (scale - transformData.scale[0]),
               };
             }
@@ -291,8 +303,14 @@ export default {
               y: transformData.translate[1] + change.y,
               k: scale,
             };
-            this.graph.transRate =
-            graphRect.width / graphBox.width / this.graph.transform.k;
+
+            this.graph.transform.x = Math.max(minDistance - this.graph.size.width * scale, this.graph.transform.x);
+            this.graph.transform.x = Math.min(this.svg.size.width - minDistance, this.graph.transform.x);
+            this.graph.transform.y = Math.max(this.graph.transform.y, minDistance);
+            this.graph.transform.y = Math.min(
+                this.graph.size.height * scale + this.svg.size.height - minDistance,
+                this.graph.transform.y
+            );
 
             tempStr =
             `translate(${this.graph.transform.x},${this.graph.transform.y}) ` +
@@ -335,33 +353,33 @@ export default {
      */
     fitGraph(id) {
       const graph = document.getElementById(id);
-      const maxShowWidth = graph.offsetWidth * 1.5;
-      const maxShowHeight = graph.offsetHeight * 1.5;
+      const maxShowWidth = graph.offsetWidth;
+      const maxShowHeight = graph.offsetHeight;
       const graphDom = document.querySelector(`#${id} #graph0`);
       const box = graphDom.getBBox();
-      let transformStr = '';
-      const graphTransformData = this.getTransformData(graphDom);
-      if (box.width > maxShowWidth || box.height > maxShowHeight) {
-        const scale = Math.max(
-            box.width / maxShowWidth / this.viewBox.scale.x,
-            box.height / maxShowHeight / this.viewBox.scale.y,
-        );
-        const translate = {x: (box.width - maxShowWidth) / 2};
+      let {
+        translate: [x, y],
+        scale: [scale],
+      } = this.getTransformData(graphDom);
 
-        if (!this.selectedNode.name) {
-          graphTransformData.translate[0] = translate.x;
-        }
-        graphTransformData.scale[0] = scale;
+      if (this.selectedNode.more) {
+        scale = this.graph.transform.k;
       } else {
-        graphTransformData.translate = [-box.x, -box.y];
-      }
-      if (id === 'graph' && this.selectedNode.more) {
-        graphTransformData.scale[0] = this.graph.transform.k;
+        if (box.width <= maxShowWidth && box.height <= maxShowHeight) {
+          const showAreaRite = 0.8;
+          scale = Math.min((maxShowWidth * showAreaRite) / box.width, (maxShowHeight * showAreaRite) / box.height);
+          x = (maxShowWidth - box.width * scale) / 2 + scale * this.graph.defaultPadding;
+          y = (maxShowHeight + box.height * scale) / 2 - scale * this.graph.defaultPadding;
+        } else if (box.width > maxShowWidth && box.height > maxShowHeight) {
+          x = -(box.width * scale - maxShowWidth) / 2;
+        } else if (box.width <= maxShowWidth) {
+          x = (maxShowWidth - box.width * scale) / 2;
+        } else if (box.height <= maxShowHeight) {
+          y = maxShowHeight / 2 + box.height / 2;
+        }
       }
-      Object.keys(graphTransformData).forEach((key) => {
-        transformStr += `${key}(${graphTransformData[key].join(',')}) `;
-      });
-      graphDom.setAttribute('transform', transformStr.trim());
+
+      graphDom.setAttribute('transform', `translate(${x},${y}) scale(${scale})`);
     },
     /**
      * Expand a namespace.
@@ -386,7 +404,8 @@ export default {
                 }
               })
               .render(() => {
-                this.fitGraph('graphTemp');
+                const svg = document.querySelector('#graphTemp svg');
+                if (svg) svg.removeAttribute('viewBox');
                 this.dealNamescopeTempGraph(name);
               });
         } catch (error) {
@@ -1519,5 +1538,19 @@ export default {
       }
     },
   },
+  destroyed() {
+    if (this.graphContainer) {
+      this.graphContainer.removeEventListener('click', this.controlEvent);
+      this.graphContainer.removeEventListener('dblclick', this.controlEvent);
+    }
+  },
 };
 </script>
+<style>
+#graphTemp,
+#subgraphTemp {
+  position: absolute;
+  bottom: 0;
+  visibility: hidden;
+}
+</style>
diff --git a/mindinsight/ui/src/mixins/debugger-mixin.vue b/mindinsight/ui/src/mixins/debugger-mixin.vue
index 3a208a98..51fb0485 100644
--- a/mindinsight/ui/src/mixins/debugger-mixin.vue
+++ b/mindinsight/ui/src/mixins/debugger-mixin.vue
@@ -136,9 +136,7 @@ export default {
      */
     collapseBtnClick() {
       this.leftShow = !this.leftShow;
-      setTimeout(() => {
-        this.initSvg(false);
-      }, 500);
+      setTimeout(this.initSvgSize, this.resizeDelay);
     },
     /**
      * Step input validation
diff --git a/mindinsight/ui/src/mixins/small-map.vue b/mindinsight/ui/src/mixins/small-map.vue
index 7e33b758..fdb38616 100644
--- a/mindinsight/ui/src/mixins/small-map.vue
+++ b/mindinsight/ui/src/mixins/small-map.vue
@@ -14,61 +14,135 @@ See the License for the specific language governing permissions and
 limitations under the License.
 -->
 <script>
+import CommonProperty from '@/common/common-property.js';
 export default {
   data() {
     return {
-      smallResize: {}, // The container of display area box.
-      insideBox: {}, // Basic information about the display area box
-      eventSmall: {}, // Relative position of the thumbnail in the thumbnail click event
+      smallContainer: {},
+      smallMap: {}, // The container of display area box.
+      insideBox: {
+        width: 0,
+        height: 0,
+        left: 0,
+        top: 0,
+      }, // Basic information about the display area box
 
       // Which mouse button is triggered when the thumbnail is clicked. -1 indicates that no click event is triggered,
       // 0 indicates the left key, 1 indicates the middle key, and 2 means right key.
       clickSmall: false,
+      smallMapEventTimer: null,
+      eventDelay: 200,
     };
   },
 
   methods: {
+    initSmallMap() {
+      this.initSmallContainer();
+      this.drawCanvas();
+      this.initGraphRectData();
+      this.setSmallMapEvents();
+    },
+    /**
+     * Initialize the small image container
+     */
+    initSmallContainer() {
+      const svgRect = document.querySelector('#graph svg').getBoundingClientRect();
+      this.svg.size = {width: svgRect.width, height: svgRect.height, left: svgRect.left, top: svgRect.top};
+      this.graph.dom = document.querySelector('#graph #graph0');
+      const graphBox = this.graph.dom.getBBox();
+      this.graph.size = {width: graphBox.width, height: graphBox.height};
+      // Attributes of smallContainer
+      const smallContainer = document.querySelector('#small-container');
+      const containerRect = smallContainer.getBoundingClientRect();
+      const borderWidth = 1;
+      this.smallContainer = {
+        left: containerRect.left + borderWidth,
+        top: containerRect.top + borderWidth,
+        height: containerRect.height - borderWidth * 2,
+        width: containerRect.width - borderWidth * 2,
+      };
+
+      // Initial width of the thumbnail frame
+      this.smallMap.width = this.smallContainer.width;
+      // The initial height of the thumbnail frame is high.
+      this.smallMap.height = this.smallContainer.height;
+      this.smallMap.left = this.smallMap.top = 0;
+      if (Object.keys(this.allGraphData).length) {
+        if (this.graph.size.width / this.graph.size.height < this.smallContainer.width / this.smallContainer.height) {
+          this.smallMap.width = (this.smallContainer.height * this.graph.size.width) / this.graph.size.height;
+          this.smallMap.left = (this.smallContainer.width - this.smallMap.width) / 2;
+        } else {
+          this.smallMap.height = (this.smallContainer.width * this.graph.size.height) / this.graph.size.width;
+          this.smallMap.top = (this.smallContainer.height - this.smallMap.height) / 2;
+        }
+      }
+    },
+    /**
+     * Draw canvas image with svg
+     */
+    drawCanvas() {
+      const svgDom = document.querySelector('#graph svg').cloneNode(true);
+      const style = document.createElement('style');
+      svgDom.append(style);
+      style.outerHTML = CommonProperty.graphDownloadStyle;
+
+      svgDom.setAttribute('width', this.graph.size.width);
+      svgDom.setAttribute('height', this.graph.size.height);
+      const transform = `translate(${this.graph.defaultPadding},${
+        this.graph.size.height - this.graph.defaultPadding
+      }) scale(1)`;
+      svgDom.querySelector('g').setAttribute('transform', transform);
+
+      const svgXml = new XMLSerializer().serializeToString(svgDom);
+      const svg = new Blob([svgXml], {type: 'image/svg+xml;charset=utf-8'});
+
+      const domUrl = self.URL || self;
+      const url = domUrl.createObjectURL(svg);
+
+      const image = new Image();
+      image.onload = () => {
+        const canvas = this.$refs.canvas;
+        const context = canvas.getContext('2d');
+        context.clearRect(0, 0, this.smallContainer.width, this.smallContainer.height);
+        context.drawImage(
+            image,
+            0,
+            0,
+            this.graph.size.width,
+            this.graph.size.height,
+            this.smallMap.left,
+            this.smallMap.top,
+            this.smallMap.width,
+            this.smallMap.height,
+        );
+      };
+      image.src = url;
+    },
     /**
      * Initialize the svg, width and height of the small image, and transform information.
      */
     initGraphRectData() {
-      this.initSmallContainer();
-
       if (!this.graph.dom) {
-        this.insideBox.width = this.smallResize.width;
-        this.insideBox.height = this.smallResize.height;
+        this.insideBox.width = this.smallMap.width;
+        this.insideBox.height = this.smallMap.height;
         this.insideBox.top = this.insideBox.left = 0;
-        this.styleSet('#inside-box', this.insideBox);
         this.insideBox.style.cursor = 'not-allowed';
       } else {
-        let transformString = '';
-        const transTemp = this.graph.dom.attributes.transform || null;
-        if (transTemp) {
-          // transform information of graph
-          transformString = transTemp.nodeValue.split(/[(,)]/);
-        } else {
-          transformString = ['translate', '0', '0', ' scale', '1'];
-        }
+        const transform = this.getTransformData(this.graph.dom);
+
         this.graph.transform = {
-          k: parseFloat(transformString[4]),
-          x: parseFloat(transformString[1]),
-          y: parseFloat(transformString[2]),
+          k: parseFloat(transform.scale[0]),
+          x: parseFloat(transform.translate[0]),
+          y: parseFloat(transform.translate[1]),
         };
 
-        const graphRect = this.graph.dom.getBoundingClientRect();
-        this.graph.transRate =
-          graphRect.width /
-          this.graph.dom.getBBox().width /
-          this.graph.transform.k;
-        this.graph.minScale =
-          Math.min(
-              this.svg.rect.width / 2 / graphRect.width,
-              this.svg.rect.height / 2 / graphRect.height,
-          ) * this.graph.transform.k;
+        this.graph.minScale = Math.min(
+            this.svg.size.width / 2 / this.graph.size.width,
+            this.svg.size.height / 2 / this.graph.size.height,
+        );
 
         this.setInsideBoxData();
       }
-      this.setSmallMapEvents();
     },
     /**
      * Initialize all events of the small image
@@ -83,14 +157,12 @@ export default {
           this.insideBoxPositionChange(e);
         };
 
-        document.onmouseup = (e) => {
-          this.clickSmall = false;
-        };
+        smallContainer.onmouseup = () => (this.clickSmall = false);
+        smallContainer.onmouseleave = () => (this.clickSmall = false);
 
         smallContainer.onmousemove = (e) => {
-          if (this.clickSmall) {
-            this.insideBoxPositionChange(e);
-          }
+          if (!this.clickSmall) return;
+          this.insideBoxPositionChange(e);
         };
 
         // Mouse wheel event
@@ -98,35 +170,20 @@ export default {
           e = e || window.event;
           const wheelDelta = e.wheelDelta ? e.wheelDelta : -e.deltaY;
           if (!isNaN(this.graph.transform.k) && this.graph.transform.k !== 0) {
-            let rate = wheelDelta > 0 ? 1.2 : 1 / 1.2;
+            const rate = wheelDelta > 0 ? 1.2 : 1 / 1.2;
 
-            let scaleTemp = this.graph.transform.k / rate;
-            if (scaleTemp <= this.graph.minScale) {
-              scaleTemp = this.graph.minScale;
-              rate = this.graph.transform.k / this.graph.minScale;
+            const scaleTemp = this.graph.transform.k / rate;
+            if (scaleTemp < this.graph.minScale || scaleTemp < this.scaleRange[0] || scaleTemp > this.scaleRange[1]) {
+              return;
             }
 
-            this.graph.transform.k = Math.max(
-                this.scaleRange[0],
-                Math.min(scaleTemp, this.scaleRange[1]),
-            );
-            this.insideBox.scale = 1 / this.graph.transform.k;
-
+            this.graph.transform.k = scaleTemp;
+            this.insideBox.scale = 1 / scaleTemp;
             this.insideBox.left += (this.insideBox.width * (1 - rate)) / 2;
             this.insideBox.top += (this.insideBox.height * (1 - rate)) / 2;
-
             this.insideBox.height = this.insideBox.height * rate;
             this.insideBox.width = this.insideBox.width * rate;
 
-            document
-                .querySelector('#graph0')
-                .setAttribute(
-                    'transform',
-                    `translate(${this.graph.transform.x},${this.graph.transform.y}) ` +
-                  `scale(${this.graph.transform.k})`,
-                );
-
-            this.styleSet('#inside-box', this.insideBox);
             this.graphChange();
           }
         };
@@ -137,130 +194,66 @@ export default {
         smallContainer.onmousewheel = null;
       }
     },
-    /**
-     * Initialize the small image container
-     */
-    initSmallContainer() {
-      this.graph.dom = document.querySelector('#graph #graph0');
-      // Attributes of smallContainer
-      const smallContainer = document.querySelector('#small-container');
-      // Reset the length and width of the smallResize and locate the fault.
-      const smallResize = document.querySelector('#small-resize');
-
-      this.smallResize.width = this.smallResize.initWidth =
-        smallContainer.offsetWidth - 2; // Initial width of the thumbnail frame
-      this.smallResize.height = this.smallResize.initHeight =
-        smallContainer.offsetHeight - 2; // The initial height of the thumbnail frame is high.
-      this.smallResize.left = this.smallResize.top = 0;
-      if (Object.keys(this.allGraphData).length) {
-        if (
-          this.svg.originSize.width / this.svg.originSize.height <
-          this.smallResize.initWidth / this.smallResize.initHeight
-        ) {
-          this.smallResize.width =
-            (this.smallResize.initHeight * this.svg.originSize.width) /
-            this.svg.originSize.height;
-          this.smallResize.left =
-            (this.smallResize.initWidth - this.smallResize.width) / 2;
-        } else {
-          this.smallResize.height =
-            (this.smallResize.initWidth * this.svg.originSize.height) /
-            this.svg.originSize.width;
-          this.smallResize.top =
-            (this.smallResize.initHeight - this.smallResize.height) / 2;
-        }
-      }
-      this.styleSet('#small-resize', this.smallResize);
-      // Distance between the thumbnail frame and the upper part of the window
-      this.smallResize.offsetLeft = smallResize.getBoundingClientRect().left;
-      // Distance between the thumbnail frame and the upper part of the window
-      this.smallResize.offsetTop = smallResize.getBoundingClientRect().top;
-
-      // Attributes of smallMap
-      const smallMap = document.querySelector('#small-map');
-      const svgOuterHtml =
-        `<svg xmlns="http://www.w3.org/2000/svg" ` +
-        `xmlns:xlink="http://www.w3.org/1999/xlink" width="100%" height="100%" ` +
-        `viewBox="0.00 0.00 ${this.svg.originSize.width} ${this.svg.originSize.height}"` +
-        `><g id="smallGraph" class="graph" transform="translate(4,${
-          this.svg.originSize.height - 4
-        }) scale(1)"` +
-        `>${this.graph.dom.innerHTML}</g></svg>`;
-
-      smallMap.innerHTML = svgOuterHtml;
-    },
     /**
      * Small image moving
      * @param {Object} e Event object
      */
     insideBoxPositionChange(e) {
-      this.eventSmall.x = e.pageX - this.smallResize.offsetLeft;
-      this.eventSmall.y = e.pageY - this.smallResize.offsetTop;
-
-      this.insideBox.left =
-        this.eventSmall.x - parseFloat(this.insideBox.width) / 2;
-      this.insideBox.top =
-        this.eventSmall.y - parseFloat(this.insideBox.height) / 2;
+      this.insideBox.left = e.x - this.smallContainer.left - parseFloat(this.insideBox.width) / 2;
+      this.insideBox.top = e.y - this.smallContainer.top - parseFloat(this.insideBox.height) / 2;
 
-      this.styleSet('#inside-box', this.insideBox);
-      this.graphChange();
+      if (this.smallMapEventTimer) clearTimeout(this.smallMapEventTimer);
+      this.smallMapEventTimer = setTimeout(this.graphChange, this.eventDelay);
     },
     /**
      * Displacement of the large picture when the small picture is changed
      */
     graphChange() {
       if (!this.graph.transform.x || isNaN(this.graph.transform.x)) {
-        this.initGraphRectData();
+        this.initSmallMap();
       }
-      const graphRect = this.graph.dom.getBoundingClientRect();
 
-      const graphSizeRate = this.svg.rect.width / this.insideBox.width;
-
-      const change = {
-        x:
-          (this.insideBox.left * graphSizeRate -
-            (this.svg.rect.left - graphRect.left)) /
-          this.graph.transRate,
-        y:
-          (this.insideBox.top * graphSizeRate -
-            (this.svg.rect.top - graphRect.top)) /
-          this.graph.transRate,
-      };
-
-      this.graph.transform.x -= change.x;
-      this.graph.transform.y -= change.y;
+      const transRate = this.smallMap.width / (this.graph.size.width * this.graph.transform.k);
+      this.graph.transform.x =
+        -(this.insideBox.left - this.smallMap.left) / transRate + this.graph.defaultPadding * this.graph.transform.k;
+      this.graph.transform.y =
+        -(this.insideBox.top - this.smallMap.top) / transRate +
+        (this.graph.size.height - this.graph.defaultPadding) * this.graph.transform.k;
 
       this.graph.dom.setAttribute(
           'transform',
-          `translate(${this.graph.transform.x},${this.graph.transform.y}) ` +
-          `scale(${this.graph.transform.k})`,
+          `translate(${this.graph.transform.x},${this.graph.transform.y}) scale(${this.graph.transform.k})`,
       );
     },
     /**
      * Displacement of the small map when the large picture is changed
      */
     setInsideBoxData() {
-      const graphRect = this.graph.dom.getBoundingClientRect();
-      const transRate = graphRect.width / this.smallResize.width;
-
-      this.insideBox.left = (this.svg.rect.left - graphRect.left) / transRate;
-      this.insideBox.top = (this.svg.rect.top - graphRect.top) / transRate;
+      const rate = this.smallMap.width / (this.graph.size.width * this.graph.transform.k);
+      this.insideBox.left =
+        this.smallMap.left - (this.graph.transform.x - this.graph.defaultPadding * this.graph.transform.k) * rate;
+      this.insideBox.top =
+        this.smallMap.top -
+        (this.graph.transform.y +
+          this.graph.defaultPadding * this.graph.transform.k -
+          this.graph.size.height * this.graph.transform.k) *
+          rate;
 
-      this.insideBox.width = this.svg.rect.width / transRate;
-      this.insideBox.height = this.svg.rect.height / transRate;
-      this.styleSet('#inside-box', this.insideBox);
+      this.insideBox.width = this.svg.size.width * rate;
+      this.insideBox.height = this.svg.size.height * rate;
     },
     /**
      * Setting the width and height of a node
-     * @param {String} id Dom id whose style needs to be modified
      * @param {Object} domData Data of dom
+     * @return {Object}
      */
-    styleSet(id, domData) {
-      const dom = document.querySelector(id);
-      dom.style.left = `${domData.left}px`;
-      dom.style.top = `${domData.top}px`;
-      dom.style.width = `${domData.width}px`;
-      dom.style.height = `${domData.height}px`;
+    styleSet(domData) {
+      const keys = ['width', 'height', 'left', 'top'];
+      const styleObj = {};
+      for (const key of keys) {
+        styleObj[key] = domData[key] + 'px';
+      }
+      return styleObj;
     },
   },
   destroyed() {
diff --git a/mindinsight/ui/src/views/debugger/debugger.vue b/mindinsight/ui/src/views/debugger/debugger.vue
index 516b4cdb..656c1171 100644
--- a/mindinsight/ui/src/views/debugger/debugger.vue
+++ b/mindinsight/ui/src/views/debugger/debugger.vue
@@ -833,16 +833,7 @@ export default {
         value: '',
       },
       devices: [],
-      allGraphData: {}, // Graph Original input data
-      firstFloorNodes: [], // ID array of the first layer node.
-      nodesCountLimit: 1500, // Maximum number of sub-nodes in a namespace.
-      maxChainNum: 70,
-      scaleRange: [0.001, 1000], // Graph zooms in and zooms out.
-      graphviz: null,
-      graphvizTemp: null,
-      graph: {},
       selectedNode: {},
-      svg: {},
       contextmenu: {
         point: {},
         id: 'contextMenu',
@@ -1217,48 +1208,13 @@ export default {
     /** ************************ graph **********************/
 
     /**
-     * Add the location attribute to each node to facilitate the obtaining of node location parameters.
+     * Initialization method executed after the graph rendering is complete
      */
-    afterInitGraph() {
-      setTimeout(() => {
-        if (this.graphviz) {
-          this.graphviz._data = null;
-          this.graphviz._dictionary = null;
-          this.graphviz = null;
-        }
-
-        if (this.graphvizTemp) {
-          this.graphvizTemp._data = null;
-          this.graphvizTemp._dictionary = null;
-          this.graphvizTemp = null;
-        }
-      }, 100);
-      this.fitGraph('graph');
-      this.transplantChildrenDom();
-      const svg = document.querySelector('#subgraphTemp svg');
-      if (svg) {
-        svg.remove();
-      }
-      const elements = d3.select('#graph').selectAll('g.node, g.edge').nodes();
-      elements.forEach((ele) => {
-        if (!ele.hasAttribute('transform')) {
-          ele.setAttribute('transform', 'translate(0,0)');
-        }
-        // The title value needs to be manually set for the virtual node.
-        if (Array.prototype.includes.call(ele.classList, 'plain')) {
-          const title = ele.querySelector('title');
-          title.textContent = title.textContent.split('^')[0];
-        }
-      });
-      // The graph generated by the plug-in has a useless title and needs to be deleted.
-      const title = document.querySelector('#graph g#graph0 title');
-      if (title) {
-        title.remove();
-      }
-      d3.selectAll('g.edge>title').remove();
-
+    startApp() {
+      this.initSvgSize();
       this.graph.dom = document.querySelector(`#graph #graph0`);
-      const graphRect = this.graph.dom.getBoundingClientRect();
+      const graphBox = this.graph.dom.getBBox();
+      this.graph.size = {width: graphBox.width, height: graphBox.height};
       let transform = '';
       if (this.graph.dom.getAttribute('transform')) {
         // transform information of graph
@@ -1272,31 +1228,9 @@ export default {
         y: parseFloat(transform[2]),
       };
 
-      this.graph.minScale =
-        Math.min(this.svg.rect.width / 2 / graphRect.width, this.svg.rect.height / 2 / graphRect.height) *
-        this.graph.transform.k;
-
-      this.startApp();
-    },
-    /**
-     * Initialization method executed after the graph rendering is complete
-     */
-    startApp() {
-      const nodes = d3.selectAll('g.node, g.cluster');
-      nodes.on(
-          'click',
-          (target, index, nodesList) => {
-            this.clickEvent(target, index, nodesList, 'debugger');
-          },
-          false,
-      );
-      // namespaces Expansion or Reduction
-      nodes.on(
-          'dblclick',
-          (target, index, nodesList) => {
-            this.dblclickEvent(target, index, nodesList, 'debugger');
-          },
-          false,
+      this.graph.minScale = Math.min(
+          this.svg.size.width / 2 / this.graph.size.width,
+          this.svg.size.height / 2 / this.graph.size.height
       );
       this.initZooming('debugger');
       this.initContextMenu();
@@ -1683,12 +1617,12 @@ export default {
       graphObj.initHeight = graphObj.rect.height / this.graph.transform.k;
 
       const screenChange = {
-        x: nodeRect.left + nodeRect.width / 2 - (this.svg.rect.left + this.svg.rect.width / 2),
-        y: nodeRect.top + nodeRect.height / 2 - (this.svg.rect.top + this.svg.rect.height / 2),
+        x: nodeRect.left + nodeRect.width / 2 - (this.svg.size.left + this.svg.size.width / 2),
+        y: nodeRect.top + nodeRect.height / 2 - (this.svg.size.top + this.svg.size.height / 2),
       };
 
-      this.graph.transform.x -= screenChange.x * (this.svg.originSize.width / graphObj.initWidth);
-      this.graph.transform.y -= screenChange.y * (this.svg.originSize.height / graphObj.initHeight);
+      this.graph.transform.x -= screenChange.x * (this.graph.size.width / graphObj.initWidth);
+      this.graph.transform.y -= screenChange.y * (this.graph.size.height / graphObj.initHeight);
 
       this.graph.dom.setAttribute(
           'transform',
@@ -1852,9 +1786,11 @@ export default {
     },
     rightCollapse() {
       this.collapseTable = !this.collapseTable;
-      setTimeout(() => {
-        this.initSvg(false);
-      }, 500);
+      setTimeout(this.initSvgSize, this.resizeDelay);
+    },
+    initSvgSize() {
+      const svgRect = document.querySelector('#graph svg').getBoundingClientRect();
+      this.svg.size = {width: svgRect.width, height: svgRect.height, left: svgRect.left, top: svgRect.top};
     },
   },
   destroyed() {},
@@ -2513,11 +2449,4 @@ export default {
 .deb-indent {
   padding-left: 40px;
 }
-
-#graphTemp,
-#subgraphTemp {
-  position: absolute;
-  bottom: 0;
-  visibility: hidden;
-}
 </style>
diff --git a/mindinsight/ui/src/views/train-manage/graph.vue b/mindinsight/ui/src/views/train-manage/graph.vue
index 5cd06225..bc2b0e27 100644
--- a/mindinsight/ui/src/views/train-manage/graph.vue
+++ b/mindinsight/ui/src/views/train-manage/graph.vue
@@ -221,10 +221,11 @@ limitations under the License.
               </div>
               <!-- Functional Area -->
               <div id="small-container">
-                <div id="small-resize">
-                  <div id="small-map"></div>
-                  <div id="inside-box"></div>
-                </div>
+                <div id="inside-box"
+                     :style="styleSet(insideBox)"></div>
+                <canvas ref="canvas"
+                        :width="smallContainer.width"
+                        :height="smallContainer.height"></canvas>
               </div>
               <!-- Node information -->
               <div :class="
@@ -507,11 +508,6 @@ export default {
   data() {
     return {
       summaryPath: this.$route.query.summaryPath,
-      graph: {}, // Basic information about graph0 in svg
-      svg: {}, // Basic information about svg
-
-      allGraphData: {}, // graph Original input data
-      firstFloorNodes: [], // ID array of the first layer node.
       // Information about the selected node
       selectedNode: {
         info: {
@@ -528,9 +524,6 @@ export default {
       },
       // Training job id
       trainJobID: '',
-      nodesCountLimit: 1500, // Maximum number of sub-nodes in a namespace.
-      maxChainNum: 70,
-
       // Node search box
       searchBox: {
         value: '',
@@ -546,11 +539,8 @@ export default {
         show: false,
         info: '',
       },
-      scaleRange: [0.001, 1000], // graph zooms in and zooms out.
       rightShow: true, // Check whether the right side bar is displayed.
       fullScreen: false, // Display Full Screen
-      graphviz: null,
-      graphvizTemp: null,
       initOver: false,
       guide: {
         show: false,
@@ -627,20 +617,18 @@ export default {
       window.localStorage.setItem('milang', this.language);
     }
 
-    document.title = `${decodeURIComponent(this.trainJobID)}-${this.$t(
-        'graph.titleText',
-    )}-MindInsight`;
-    this.getDatavisualPlugins();
+    document.title = `${decodeURIComponent(this.trainJobID)}-${this.$t('graph.titleText')}-MindInsight`;
     window.onresize = () => {
       if (this.graph.dom) {
         this.$nextTick(() => {
           setTimeout(() => {
-            this.initSvg(false);
-            this.initGraphRectData();
-          }, 500);
+            this.initSmallMap();
+          }, this.resizeDelay);
         });
       }
     };
+
+    this.$nextTick(this.getDatavisualPlugins);
   },
   destroyed() {
     window.onresize = null;
@@ -789,69 +777,15 @@ export default {
         this.querySingleNode({value: data.name});
       }
     },
-    /**
-     * Add the location attribute to each node to facilitate the obtaining of node location parameters.
-     */
-    afterInitGraph() {
-      setTimeout(() => {
-        if (this.graphviz) {
-          this.graphviz._data = null;
-          this.graphviz._dictionary = null;
-          this.graphviz = null;
-        }
 
-        if (this.graphvizTemp) {
-          this.graphvizTemp._data = null;
-          this.graphvizTemp._dictionary = null;
-          this.graphvizTemp = null;
-        }
-      }, 100);
-      this.fitGraph('graph');
-      this.transplantChildrenDom();
-      const svg = document.querySelector('#subgraphTemp svg');
-      if (svg) {
-        svg.remove();
-      }
-      this.$nextTick(() => {
-        this.loading.show = false;
-      });
-      const elements = d3.select('#graph').selectAll('g.node, g.edge').nodes();
-      elements.forEach((ele) => {
-        if (!ele.hasAttribute('transform')) {
-          ele.setAttribute('transform', 'translate(0,0)');
-        }
-        // The title value needs to be manually set for the virtual node.
-        if (Array.prototype.includes.call(ele.classList, 'plain')) {
-          const title = ele.querySelector('title');
-          title.textContent = title.textContent.split('^')[0];
-        }
-      });
-      d3.selectAll('g.edge>title').remove();
-      // The graph generated by the plug-in has a useless title and needs to be deleted.
-      document.querySelector('#graph g#graph0 title').remove();
-      this.initGraphRectData();
-      this.startApp();
-    },
     /**
      * Initialization method executed after the graph rendering is complete
      */
     startApp() {
-      const nodes = d3.selectAll('g.node, g.cluster');
-      nodes.on(
-          'click',
-          (target, index, nodesList) => {
-            this.clickEvent(target, index, nodesList, 'graph');
-          },
-          false,
-      );
-      // namespaces Expansion or Reduction
-      nodes.on(
-          'dblclick',
-          (target, index, nodesList) => {
-            this.dblclickEvent(target, index, nodesList, 'graph');
-          },
-          false,
-      );
+      this.$nextTick(() => {
+        this.loading.show = false;
+      });
+      this.initSmallMap();
       this.initZooming('graph');
       if (this.selectedNode.name) {
         this.selectNode(true);
@@ -940,7 +874,7 @@ export default {
                         this.layoutNamescope(name, true);
                       }
                     } else {
-                      this.initGraphRectData();
+                      this.initSmallMap();
                       this.loading.show = false;
                     }
                     const data = response.data.nodes.map((val) => {
@@ -1212,25 +1146,16 @@ export default {
       graph.initHeight = graph.rect.height / this.graph.transform.k;
 
       const screenChange = {
-        x:
-          nodeRect.left +
-          nodeRect.width / 2 -
-          (this.svg.rect.left + this.svg.rect.width / 2),
-        y:
-          nodeRect.top +
-          nodeRect.height / 2 -
-          (this.svg.rect.top + this.svg.rect.height / 2),
+        x: nodeRect.left + nodeRect.width / 2 - (this.svg.size.left + this.svg.size.width / 2),
+        y: nodeRect.top + nodeRect.height / 2 - (this.svg.size.top + this.svg.size.height / 2),
       };
 
-      this.graph.transform.x -=
-        screenChange.x * (this.svg.originSize.width / graph.initWidth);
-      this.graph.transform.y -=
-        screenChange.y * (this.svg.originSize.height / graph.initHeight);
+      this.graph.transform.x -= screenChange.x * (this.graph.size.width / graph.initWidth);
+      this.graph.transform.y -= screenChange.y * (this.graph.size.height / graph.initHeight);
 
       this.graph.dom.setAttribute(
           'transform',
-          `translate(${this.graph.transform.x},` +
-          `${this.graph.transform.y}) scale(${this.graph.transform.k})`,
+          `translate(${this.graph.transform.x},${this.graph.transform.y}) scale(${this.graph.transform.k})`
       );
 
       const transitionTime = Math.min(
@@ -1625,20 +1550,14 @@ export default {
      */
     toggleRight() {
       this.rightShow = !this.rightShow;
-      setTimeout(() => {
-        this.initSvg(false);
-        this.initGraphRectData();
-      }, 500);
+      setTimeout(this.initSmallMap, this.resizeDelay);
     },
     /**
      * Full-screen display
      */
     toggleScreen() {
       this.fullScreen = !this.fullScreen;
-      setTimeout(() => {
-        this.initSvg(false);
-        this.initGraphRectData();
-      }, 500);
+      setTimeout(this.initSmallMap, this.resizeDelay);
     },
     /**
      * Download svg
@@ -1929,23 +1848,9 @@ export default {
   background-color: white;
   position: relative;
 }
-.cl-graph-manage #graphs #sidebar #small-container #small-resize {
-  width: 100%;
-  height: 100%;
-  position: absolute;
-  left: 0;
-  top: 0;
-}
-.cl-graph-manage #graphs #sidebar #small-container #small-map {
-  height: 100%;
-  width: 100%;
-  position: relative;
-  padding: 0;
-}
 .cl-graph-manage #graphs #sidebar #small-container #inside-box {
   background-color: #5b88f1;
   position: absolute;
-  /* Transparency */
   opacity: 0.3;
   width: 100%;
   height: 100%;
@@ -2207,8 +2112,7 @@ export default {
   stroke: red !important;
   stroke-width: 2px;
 }
-.cl-graph-manage #graphs .graph-container,
-.cl-graph-manage #graphs #small-map {
+.cl-graph-manage #graphs .graph-container {
   font-size: 16px;
   position: relative;
   display: inline-block;
@@ -2222,76 +2126,60 @@ export default {
   -ms-user-select: none;
   user-select: none;
 }
-.cl-graph-manage #graphs .graph-container .graph,
-.cl-graph-manage #graphs #small-map .graph {
+.cl-graph-manage #graphs .graph-container .graph {
   height: 100%;
   background-color: #f7faff;
 }
-.cl-graph-manage #graphs .graph-container #graph0 > polygon,
-.cl-graph-manage #graphs #small-map #graph0 > polygon {
+.cl-graph-manage #graphs .graph-container #graph0 > polygon {
   fill: transparent;
 }
-.cl-graph-manage #graphs .graph-container .node,
-.cl-graph-manage #graphs #small-map .node {
+.cl-graph-manage #graphs .graph-container .node {
   cursor: pointer;
 }
-.cl-graph-manage #graphs .graph-container .edge path,
-.cl-graph-manage #graphs #small-map .edge path {
+.cl-graph-manage #graphs .graph-container .edge path {
   stroke: #787878;
 }
-.cl-graph-manage #graphs .graph-container .edge polygon,
-.cl-graph-manage #graphs #small-map .edge polygon {
+.cl-graph-manage #graphs .graph-container .edge polygon {
   fill: #787878;
 }
-.cl-graph-manage #graphs .graph-container .edge.highlighted path,
-.cl-graph-manage #graphs #small-map .edge.highlighted path {
+.cl-graph-manage #graphs .graph-container .edge.highlighted path {
   stroke: red;
 }
-.cl-graph-manage #graphs .graph-container .edge.highlighted polygon,
-.cl-graph-manage #graphs #small-map .edge.highlighted polygon {
+.cl-graph-manage #graphs .graph-container .edge.highlighted polygon {
   stroke: red;
   fill: red;
 }
-.cl-graph-manage #graphs .graph-container .edge.highlighted marker path,
-.cl-graph-manage #graphs #small-map .edge.highlighted marker path {
+.cl-graph-manage #graphs .graph-container .edge.highlighted marker path {
   fill: red;
 }
-.cl-graph-manage #graphs .graph-container .node.aggregation > polygon,
-.cl-graph-manage #graphs #small-map .node.aggregation > polygon {
+.cl-graph-manage #graphs .graph-container .node.aggregation > polygon {
   stroke: #e3aa00;
   fill: #ffe794;
 }
-.cl-graph-manage #graphs .graph-container .node.cluster.aggregation > rect,
-.cl-graph-manage #graphs #small-map .node.cluster.aggregation > rect {
+.cl-graph-manage #graphs .graph-container .node.cluster.aggregation > rect {
   stroke: #e3aa00;
   fill: #ffe794;
   stroke-dasharray: 3, 3;
 }
-.cl-graph-manage #graphs .graph-container .node > polygon,
-.cl-graph-manage #graphs #small-map .node > polygon {
+.cl-graph-manage #graphs .graph-container .node > polygon {
   stroke: #00a5a7;
   fill: #8df1f2;
 }
-.cl-graph-manage #graphs .graph-container .node > ellipse,
-.cl-graph-manage #graphs #small-map .node > ellipse {
+.cl-graph-manage #graphs .graph-container .node > ellipse {
   stroke: #4ea6e6;
   fill: #b8e0ff;
 }
 .cl-graph-manage #graphs .graph-container .plain > path,
-.cl-graph-manage #graphs .graph-container .plain ellipse,
-.cl-graph-manage #graphs #small-map .plain > path,
-.cl-graph-manage #graphs #small-map .plain ellipse {
+.cl-graph-manage #graphs .graph-container .plain ellipse {
   stroke: #e37d29;
   fill: #ffd0a6;
   stroke-dasharray: 1.5, 1.5;
 }
-.cl-graph-manage #graphs .graph-container .edge-point ellipse,
-.cl-graph-manage #graphs #small-map .edge-point ellipse {
+.cl-graph-manage #graphs .graph-container .edge-point ellipse {
   stroke: #a7a7a7;
   fill: #a7a7a7;
 }
-.cl-graph-manage #graphs .graph-container text,
-.cl-graph-manage #graphs #small-map text {
+.cl-graph-manage #graphs .graph-container text {
   fill: black;
 }
 .cl-graph-manage #graphs .image-noData {
@@ -2328,11 +2216,4 @@ export default {
 .cl-graph-manage .cl-title-right {
   padding-right: 32px;
 }
-
-#graphTemp,
-#subgraphTemp {
-  position: absolute;
-  bottom: 0;
-  visibility: hidden;
-}
 </style>