diff --git a/ge/CMakeLists.txt b/ge/CMakeLists.txt
index 317ff00a..17e8e80a 100755
--- a/ge/CMakeLists.txt
+++ b/ge/CMakeLists.txt
@@ -157,7 +157,9 @@ set(TRAIN_SRC_LIST
     "graph/passes/compile_nodes_pass.cc"
     "graph/passes/constant_folding_pass.cc"
     "graph/passes/constant_fuse_same_pass.cc"
+    "graph/passes/fuse_data_nodes_with_common_input_pass.cc"
     "graph/passes/remove_same_const_pass.cc"
+    "graph/passes/no_data_out_const_elimination_pass.cc"
     "graph/passes/useless_control_out_remove_pass.cc"
     "graph/passes/control_trigger_pass.cc"
     "graph/passes/dimension_adjust_pass.cc"
@@ -439,6 +441,7 @@ set(INFER_SRC_LIST
     "graph/passes/net_output_pass.cc"
     "graph/passes/replace_transshape_pass.cc"
     "graph/passes/constant_fuse_same_pass.cc"
+    "graph/passes/fuse_data_nodes_with_common_input_pass.cc"
     "graph/passes/print_op_pass.cc"
     "graph/passes/no_use_reshape_remove_pass.cc"
     "graph/passes/iterator_op_pass.cc"
@@ -535,6 +538,7 @@ set(INFER_SRC_LIST
     "graph/passes/addn_pass.cc"
     "graph/passes/common_subexpression_elimination_pass.cc"
     "graph/passes/remove_same_const_pass.cc"
+    "graph/passes/no_data_out_const_elimination_pass.cc"
     "graph/passes/useless_control_out_remove_pass.cc"
     "graph/passes/transop_symmetry_elimination_pass.cc"
     "graph/passes/save_pass.cc"
diff --git a/ge/ge_inference.mk b/ge/ge_inference.mk
index 74d09404..1830e847 100755
--- a/ge/ge_inference.mk
+++ b/ge/ge_inference.mk
@@ -103,6 +103,7 @@ OMG_HOST_SRC_FILES := \
     graph/passes/net_output_pass.cc \
     graph/passes/replace_transshape_pass.cc \
     graph/passes/constant_fuse_same_pass.cc \
+    graph/passes/fuse_data_nodes_with_common_input_pass.cc \
     graph/passes/print_op_pass.cc \
     graph/passes/no_use_reshape_remove_pass.cc \
     graph/passes/iterator_op_pass.cc \
@@ -193,6 +194,7 @@ OMG_HOST_SRC_FILES := \
     graph/passes/cond_pass.cc \
     graph/passes/cond_remove_pass.cc \
     graph/passes/remove_same_const_pass.cc \
+    graph/passes/no_data_out_const_elimination_pass.cc \
     graph/passes/useless_control_out_remove_pass.cc \
     graph/passes/for_pass.cc \
     graph/passes/enter_pass.cc \
diff --git a/ge/ge_runner.mk b/ge/ge_runner.mk
index 5a99dc8c..9dcac211 100644
--- a/ge/ge_runner.mk
+++ b/ge/ge_runner.mk
@@ -127,7 +127,9 @@ LIBGE_LOCAL_SRC_FILES := \
     graph/passes/compile_nodes_pass.cc \
     graph/passes/constant_folding_pass.cc \
     graph/passes/constant_fuse_same_pass.cc \
+    graph/passes/fuse_data_nodes_with_common_input_pass.cc \
     graph/passes/remove_same_const_pass.cc \
+    graph/passes/no_data_out_const_elimination_pass.cc \
     graph/passes/useless_control_out_remove_pass.cc \
     graph/passes/control_trigger_pass.cc \
     graph/passes/dimension_adjust_pass.cc \
diff --git a/ge/graph/load/new_model_manager/zero_copy_offset.h b/ge/graph/load/new_model_manager/zero_copy_offset.h
index 8ead742d..66fcd887 100644
--- a/ge/graph/load/new_model_manager/zero_copy_offset.h
+++ b/ge/graph/load/new_model_manager/zero_copy_offset.h
@@ -65,7 +65,7 @@ class ZeroCopyOffset {
   // data_size of Data/Netoutput
   int64_t GetDataSize() const { return data_size_; }
   // value of *outside_addrs_ from davinci_model
-  std::vector<std::map<const void *, std::vector<void *>>> &GetOutsideAddrs() { return outside_addrs_; }
+  const std::vector<std::map<const void *, std::vector<void *>>> &GetOutsideAddrs() { return outside_addrs_; }
   // name of op
   std::string GetOpName() const { return op_name_; }
 
diff --git a/ge/graph/manager/graph_manager.cc b/ge/graph/manager/graph_manager.cc
index aec811e4..ae516a8f 100755
--- a/ge/graph/manager/graph_manager.cc
+++ b/ge/graph/manager/graph_manager.cc
@@ -53,6 +53,7 @@
 #include "graph/passes/dimension_adjust_pass.h"
 #include "graph/passes/dimension_compute_pass.h"
 #include "graph/passes/flow_ctrl_pass.h"
+#include "graph/passes/fuse_data_nodes_with_common_input_pass.h"
 #include "graph/passes/identity_pass.h"
 #include "graph/passes/input_output_connection_identify_pass.h"
 #include "graph/passes/iterator_op_pass.h"
@@ -70,6 +71,7 @@
 #include "graph/passes/remove_same_const_pass.h"
 #include "graph/passes/reshape_recovery_pass.h"
 #include "graph/passes/reshape_remove_pass.h"
+#include "graph/passes/no_data_out_const_elimination_pass.h"
 #include "graph/passes/same_transdata_breadth_fusion_pass.h"
 #include "graph/passes/subgraph_pass.h"
 #include "graph/passes/switch_data_edges_bypass.h"
@@ -2104,6 +2106,24 @@ Status GraphManager::OptimizeStage1(ge::ComputeGraphPtr &compute_graph) {
       after_merge_passes.AddPass("OptimizeStage1_1::SwitchDataEdgesBypass", new (std::nothrow) SwitchDataEdgesBypass));
   GE_CHK_STATUS_RET(
       after_merge_passes.AddPass("OptimizeStage1_1::ConstantFuseSamePass", new (std::nothrow) ConstantFuseSamePass));
+  /*
+   * Do CSE before FuseDataNodesWithCommonInputPass to resolve the scene in bertlarge as following:
+   *            const
+   *    /        |        \
+   * cast1      cast2     cast3
+   *    \         |         /
+   *             case
+   * the node `const` is the fused const node after ConstantFuseSamePass
+   * the nodes `cast1`, `cast2` and 'cast3' will be fused by CSE.
+   * in order to eliminate hard code in FuseDataNodesWithCommonInputPass,
+   * we do CSE before FuseDataNodesWithCommonInputPass
+   * But it is a temp solution, this CSE will be deleted after change pass from graph pass to node pass
+   */
+  GE_CHK_STATUS_RET(after_merge_passes.AddPass("OptimizeStage1_1::CSEBeforeFuseDataNodesWithCommonInputPass",
+                                               new (std::nothrow) CommonSubexpressionEliminationPass));
+  // FuseDataNodesWithCommonInputPass: fuse same data with common input in same graph
+  GE_CHK_STATUS_RET(after_merge_passes.AddPass("OptimizeStage1_1::FuseDataNodesWithCommonInputPass",
+                                               new (std::nothrow) FuseDataNodesWithCommonInputPass));
   GE_CHK_STATUS_RET(after_merge_passes.AddPass("OptimizeStage1_1::CommonSubexpressionEliminationPass",
                                                new (std::nothrow) CommonSubexpressionEliminationPass));
   GE_CHK_STATUS_RET(after_merge_passes.AddPass("OptimizeStage1_1::PermutePass", new (std::nothrow) PermutePass))
@@ -2226,12 +2246,14 @@ Status GraphManager::OptimizeStage1(ge::ComputeGraphPtr &compute_graph) {
     GELOGE(ret, "Run passes when OptimizeStage1_3 failed, ret:%u.", ret);
     return ret;
   }
-  NamesToPass identity_remove_pass;
-  GE_TIMESTAMP_START(identity_remove_pass);
+  NamesToPass node_pass;
+  GE_TIMESTAMP_START(node_pass);
   IdentityPass identity_force_pass(false);  // after SwitchToStreamSwitchPass
-  identity_remove_pass.emplace_back("IdentityPass", &identity_force_pass);
-  ret = GEPass(compute_graph).Run(identity_remove_pass);
-  GE_TIMESTAMP_END(identity_remove_pass, "GraphPrepare::IdentityRemovePass");
+  NoDataOutConstEliminationPass no_data_out_const_elimination_pass;
+  node_pass.emplace_back("IdentityPass", &identity_force_pass);
+  node_pass.emplace_back("NoDataOutConstEliminationPass", &no_data_out_const_elimination_pass);
+  ret = GEPass(compute_graph).Run(node_pass);
+  GE_TIMESTAMP_END(node_pass, "GraphPrepare::node_pass");
   if (ret != SUCCESS) {
     GELOGE(ret, "Run identity remove pass for preprocess failed, ret:%u.", ret);
     return ret;
diff --git a/ge/graph/passes/fuse_data_nodes_with_common_input_pass.cc b/ge/graph/passes/fuse_data_nodes_with_common_input_pass.cc
new file mode 100644
index 00000000..ab8fc39b
--- /dev/null
+++ b/ge/graph/passes/fuse_data_nodes_with_common_input_pass.cc
@@ -0,0 +1,119 @@
+/**
+ * Copyright 2021 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "graph/passes/fuse_data_nodes_with_common_input_pass.h"
+
+#include <map>
+#include <memory>
+#include <string>
+#include <vector>
+#include <set>
+#include "common/ge_inner_error_codes.h"
+#include "graph/utils/op_desc_utils.h"
+#include "graph/utils/type_utils.h"
+#include "graph/utils/node_utils.h"
+
+using std::map;
+using std::vector;
+using std::set;
+using std::string;
+
+namespace ge {
+Status FuseDataNodesWithCommonInputPass::Run(ge::ComputeGraphPtr graph) {
+  if (graph == nullptr) {
+    GELOGE(GE_GRAPH_PARAM_NULLPTR, "Compute graph is null.");
+    return GE_GRAPH_PARAM_NULLPTR;
+  }
+  GELOGD("FuseDataNodesWithCommonInputPass in.");
+  // key: subgraph, value:--key: peer out anchor to parent node, --value: parent indexes to parent node
+  map<ComputeGraphPtr, map<OutDataAnchorPtr, set<uint32_t>>> subgraphs_to_need_fuse_nodes_info;
+  if (InitNeedFuseNodesInfo(graph, subgraphs_to_need_fuse_nodes_info) != SUCCESS) {
+    GELOGE(FAILED, "InitNeedFuseNodesInfo failed.");
+    return FAILED;
+  }
+  return FuseDataNodes(subgraphs_to_need_fuse_nodes_info);
+}
+
+Status FuseDataNodesWithCommonInputPass::InitNeedFuseNodesInfo(ComputeGraphPtr &graph,
+    map<ComputeGraphPtr, map<OutDataAnchorPtr, set<uint32_t>>> &subgraphs_to_need_fuse_nodes_info) {
+  for (const auto &subgraph : graph->GetAllSubgraphs()) {
+    GE_CHECK_NOTNULL(subgraph);
+    auto parent_node = subgraph->GetParentNode();
+    GE_CHECK_NOTNULL(parent_node);
+    if (parent_node->GetType() == CASE || parent_node->GetType() == IF) {
+      auto &peer_out_anchors_to_parent_indexes = subgraphs_to_need_fuse_nodes_info[subgraph];
+      for (const auto &in_data_anchor : parent_node->GetAllInDataAnchors()) {
+        GE_CHECK_NOTNULL(in_data_anchor);
+        OutDataAnchorPtr peer_out_anchor = in_data_anchor->GetPeerOutAnchor();
+        uint32_t parent_index = static_cast<uint32_t>(in_data_anchor->GetIdx());
+        GE_CHECK_NOTNULL(peer_out_anchor);
+        peer_out_anchors_to_parent_indexes[peer_out_anchor].insert(parent_index);
+        GELOGD("Peer node %s is the %d input of parent node %s in %s.",
+               peer_out_anchor->GetOwnerNode()->GetName().c_str(), parent_index, parent_node->GetName().c_str(),
+               subgraph->GetName().c_str());
+      }
+    }
+  }
+  return SUCCESS;
+}
+
+Status FuseDataNodesWithCommonInputPass::FuseDataNodes(
+    const map<ComputeGraphPtr, map<OutDataAnchorPtr, set<uint32_t>>> &subgraphs_to_need_fuse_nodes_info) {
+  for (const auto &subgraph_to_need_fuse_nodes_info : subgraphs_to_need_fuse_nodes_info) {
+    auto subgraph = subgraph_to_need_fuse_nodes_info.first;
+    for (const auto &peer_out_anchors_to_parent_indexes : subgraph_to_need_fuse_nodes_info.second) {
+      if (peer_out_anchors_to_parent_indexes.second.size() <= 1) {
+        continue;
+      }
+      // key: out anchor, value: data nodes with common input will be fused
+      map<OutDataAnchorPtr, vector<NodePtr>> peer_out_anchors_to_need_fuse_nodes;
+      for (const auto &node : subgraph->GetDirectNode()) {
+        if (node->GetType() != DATA) {
+          continue;
+        }
+        GE_CHECK_NOTNULL(node->GetOpDesc());
+        uint32_t parent_index = 0;
+        if (AttrUtils::GetInt(node->GetOpDesc(), ATTR_NAME_PARENT_NODE_INDEX, parent_index)) {
+          if (peer_out_anchors_to_parent_indexes.second.count(parent_index) > 0) {
+            peer_out_anchors_to_need_fuse_nodes[peer_out_anchors_to_parent_indexes.first].emplace_back(node);
+          }
+        }
+      }
+      for (const auto &peer_out_anchor_to_need_fuse_nodes : peer_out_anchors_to_need_fuse_nodes) {
+        auto need_fuse_data_nodes = peer_out_anchor_to_need_fuse_nodes.second;
+        auto first_node = need_fuse_data_nodes.at(0);
+        for (size_t i = 1; i < need_fuse_data_nodes.size(); ++i) {
+          auto node = need_fuse_data_nodes.at(i);
+          GELOGI("Replace redundant data node %s by %s exist in graph: %s.", node->GetName().c_str(),
+                 first_node->GetName().c_str(), subgraph->GetName().c_str());
+          // the data node which can be fused has none input(both data and control in)
+          if (GraphUtils::MoveOutCtrlEdges(node, first_node) != SUCCESS) {
+            return FAILED;
+          }
+          if (GraphUtils::ReplaceNodeDataAnchors(first_node, node, {}, {0}) != SUCCESS) {
+            return FAILED;
+          }
+          if (GraphUtils::RemoveNodeWithoutRelink(subgraph, node) != SUCCESS) {
+            GELOGE(FAILED, "[%s] RemoveNodeWithoutRelink failed.", node->GetName().c_str());
+            return FAILED;
+          }
+        }
+      }
+    }
+  }
+  return SUCCESS;
+}
+}  // namespace ge
diff --git a/ge/graph/passes/fuse_data_nodes_with_common_input_pass.h b/ge/graph/passes/fuse_data_nodes_with_common_input_pass.h
new file mode 100755
index 00000000..9ff6ab89
--- /dev/null
+++ b/ge/graph/passes/fuse_data_nodes_with_common_input_pass.h
@@ -0,0 +1,38 @@
+/**
+ * Copyright 2021 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef GE_GRAPH_PASSES_FUSE_DATA_NODES_WITH_COMMON_INPUT_PASS_H_
+#define GE_GRAPH_PASSES_FUSE_DATA_NODES_WITH_COMMON_INPUT_PASS_H_
+
+#include <set>
+#include <map>
+#include <vector>
+#include "graph/types.h"
+#include "inc/graph_pass.h"
+
+namespace ge {
+class FuseDataNodesWithCommonInputPass : public GraphPass {
+ public:
+  Status Run(ge::ComputeGraphPtr graph) override;
+
+ private:
+  Status InitNeedFuseNodesInfo(ComputeGraphPtr &graph,
+      map<ComputeGraphPtr, map<OutDataAnchorPtr, std::set<uint32_t>>> &subgraphs_to_need_fuse_nodes_info);
+  Status FuseDataNodes(
+      const map<ComputeGraphPtr, map<OutDataAnchorPtr, std::set<uint32_t>>> &subgraphs_to_need_fuse_nodes_info);
+};
+} // namespace ge
+#endif // GE_GRAPH_PASSES_FUSE_DATA_NODES_WITH_COMMON_INPUT_PASS_H_
diff --git a/ge/graph/passes/no_data_out_const_elimination_pass.cc b/ge/graph/passes/no_data_out_const_elimination_pass.cc
new file mode 100644
index 00000000..c55148bd
--- /dev/null
+++ b/ge/graph/passes/no_data_out_const_elimination_pass.cc
@@ -0,0 +1,36 @@
+/**
+ * Copyright 2021 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "graph/passes/no_data_out_const_elimination_pass.h"
+
+namespace ge {
+Status NoDataOutConstEliminationPass::Run(NodePtr &node) {
+  GE_CHECK_NOTNULL(node);
+  GELOGD("RemoveConstWithoutDataPass running of %s.", node->GetName().c_str());
+  if (node->GetType() == CONSTANT || node->GetType() == CONSTANTOP) {
+    GE_CHECK_NOTNULL(node->GetOpDesc());
+    // delete const which has no input and no output of data
+    if (node->GetOpDesc()->GetInputsSize() == 0 && node->GetOutDataNodes().size() == 0) {
+      GELOGI("Remove const %s.", node->GetName().c_str());
+      if (IsolateAndDeleteNode(node, {}) != SUCCESS) {
+        GELOGE(FAILED, "IsolateAndDeleteNode %s failed.", node->GetName().c_str());
+        return FAILED;
+      }
+    }
+  }
+  return SUCCESS;
+}
+}  // namespace ge
diff --git a/ge/graph/passes/no_data_out_const_elimination_pass.h b/ge/graph/passes/no_data_out_const_elimination_pass.h
new file mode 100644
index 00000000..112c4867
--- /dev/null
+++ b/ge/graph/passes/no_data_out_const_elimination_pass.h
@@ -0,0 +1,31 @@
+/**
+ * Copyright 2021 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef GE_GRAPH_PASSES_REMOVE_CONST_WITHOUT_DATA_PASS_H_
+#define GE_GRAPH_PASSES_REMOVE_CONST_WITHOUT_DATA_PASS_H_
+
+#include "graph/passes/base_pass.h"
+#include "framework/common/debug/ge_log.h"
+#include "framework/common/util.h"
+
+namespace ge {
+class NoDataOutConstEliminationPass : public BaseNodePass {
+ public:
+  Status Run(ge::NodePtr &node) override;
+};
+}  // namespace ge
+
+#endif  // GE_GRAPH_PASSES_REMOVE_CONST_WITHOUT_DATA_PASS_H_
diff --git a/tests/ut/ge/CMakeLists.txt b/tests/ut/ge/CMakeLists.txt
index 2ebe9fc9..0d4f6a66 100755
--- a/tests/ut/ge/CMakeLists.txt
+++ b/tests/ut/ge/CMakeLists.txt
@@ -178,6 +178,8 @@ set(COMMON_SRC_FILES
     "${GE_CODE_DIR}/ge/graph/passes/net_output_pass.cc"
     "${GE_CODE_DIR}/ge/graph/passes/replace_transshape_pass.cc"
     "${GE_CODE_DIR}/ge/graph/passes/constant_fuse_same_pass.cc"
+	"${GE_CODE_DIR}/ge/graph/passes/fuse_data_nodes_with_common_input_pass.cc"
+	"${GE_CODE_DIR}/ge/graph/passes/no_data_out_const_elimination_pass.cc"
     "${GE_CODE_DIR}/ge/graph/passes/print_op_pass.cc"
     "${GE_CODE_DIR}/ge/graph/passes/no_use_reshape_remove_pass.cc"
     "${GE_CODE_DIR}/ge/graph/passes/iterator_op_pass.cc"
@@ -616,6 +618,8 @@ set(PASS_TEST_FILES
     "graph/passes/trans_op_depth_fusion_pass_unittest.cc"
     "graph/passes/transop_nearby_allreduce_fusion_pass_unittest.cc"
     "graph/passes/constant_folding_pass_unittest.cc"
+	"graph/passes/fuse_data_nodes_with_common_input_pass_unittest.cc"
+	"graph/passes/no_data_out_const_elimination_pass_unittest.cc"
     "graph/passes/stop_gradient_pass_unittest.cc"
     "graph/passes/prevent_gradient_pass_unittest.cc"
     "graph/passes/identity_pass_unittest.cc"
diff --git a/tests/ut/ge/graph/passes/fuse_data_nodes_with_common_input_pass_unittest.cc b/tests/ut/ge/graph/passes/fuse_data_nodes_with_common_input_pass_unittest.cc
new file mode 100644
index 00000000..1660b3c6
--- /dev/null
+++ b/tests/ut/ge/graph/passes/fuse_data_nodes_with_common_input_pass_unittest.cc
@@ -0,0 +1,156 @@
+/**
+ * Copyright 2021 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "graph/passes/fuse_data_nodes_with_common_input_pass.h"
+
+#include <gtest/gtest.h>
+#include <string>
+#include <vector>
+#include <map>
+
+#include "inc/pass_manager.h"
+#include "common/ge_inner_error_codes.h"
+#include "graph_builder_utils.h"
+#include "graph/utils/tensor_utils.h"
+#include "graph/utils/op_desc_utils.h"
+#include "graph/utils/type_utils.h"
+#include "graph/utils/node_utils.h"
+
+namespace ge {
+
+class UtestFuseDataNodesWithCommonInputPass : public testing::Test {
+protected:
+  void SetUp() {}
+  void TearDown() {}
+
+public:
+  NodePtr MakeNode(const ComputeGraphPtr &graph, uint32_t in_num, uint32_t out_num, string name, string type) {
+    GeTensorDesc test_desc(GeShape(), FORMAT_NCHW, DT_FLOAT);
+    auto op_desc = std::make_shared<OpDesc>(name, type);
+    for (auto i = 0; i < in_num; ++i) {
+      op_desc->AddInputDesc(test_desc);
+    }
+    for (auto i = 0; i < out_num; ++i) {
+      op_desc->AddOutputDesc(test_desc);
+    }
+    return graph->AddNode(op_desc);
+  }
+};
+
+/// graph with subgraph
+///       const
+///       | | |
+///        case
+///          |
+///       netoutput
+///        ...
+///      data0      data1       data2
+///         |          \         /
+///      conv               add
+TEST_F(UtestFuseDataNodesWithCommonInputPass, graph_with_subgraph1) {
+  PassManager pass_manager;
+  pass_manager.AddPass("FuseDataNodesWithCommonInputPass", new (std::nothrow) FuseDataNodesWithCommonInputPass);
+  ComputeGraphPtr parent_graph = std::make_shared<ComputeGraph>("parent_graph");
+  auto parent_const = MakeNode(parent_graph, 0, 1, "parent_const", "Const");
+  auto parent_case = MakeNode(parent_graph, 3, 1, "parent_case", "Case");
+  auto parent_output = MakeNode(parent_graph, 1, 0, "parent_output", "NetOutput");
+
+  GeTensorDesc tensor_desc(GeShape({1,3,224,224}), FORMAT_NCHW, DT_FLOAT);
+
+  parent_const->GetOpDesc()->UpdateOutputDesc(0, tensor_desc);
+  parent_case->GetOpDesc()->UpdateInputDesc(0, tensor_desc);
+  parent_case->GetOpDesc()->UpdateInputDesc(1, tensor_desc);
+  parent_case->GetOpDesc()->UpdateInputDesc(2, tensor_desc);
+  parent_case->GetOpDesc()->UpdateOutputDesc(0, tensor_desc);
+
+  GraphUtils::AddEdge(parent_const->GetOutDataAnchor(0), parent_case->GetInDataAnchor(0));
+  GraphUtils::AddEdge(parent_const->GetOutDataAnchor(0), parent_case->GetInDataAnchor(1));
+  GraphUtils::AddEdge(parent_const->GetOutDataAnchor(0), parent_case->GetInDataAnchor(2));
+  GraphUtils::AddEdge(parent_case->GetOutDataAnchor(0), parent_output->GetInDataAnchor(0));
+
+  ComputeGraphPtr sub_graph = std::make_shared<ComputeGraph>("sub_graph");
+  auto data0 = MakeNode(parent_graph, 1, 1, "data0", "Data");
+  data0->GetOpDesc()->UpdateInputDesc(0, tensor_desc);
+  data0->GetOpDesc()->UpdateOutputDesc(0, tensor_desc);
+  auto data1 = MakeNode(parent_graph, 1, 1, "data1", "Data");
+  data1->GetOpDesc()->UpdateInputDesc(0, tensor_desc);
+  data1->GetOpDesc()->UpdateOutputDesc(0, tensor_desc);
+  auto data2 = MakeNode(parent_graph, 1, 1, "data2", "Data");
+  data2->GetOpDesc()->UpdateInputDesc(0, tensor_desc);
+  data2->GetOpDesc()->UpdateOutputDesc(0, tensor_desc);
+  (void)AttrUtils::SetInt(data0->GetOpDesc(), ATTR_NAME_PARENT_NODE_INDEX, 0);
+  (void)AttrUtils::SetInt(data1->GetOpDesc(), ATTR_NAME_PARENT_NODE_INDEX, 1);
+  (void)AttrUtils::SetInt(data2->GetOpDesc(), ATTR_NAME_PARENT_NODE_INDEX, 2);
+
+  sub_graph->SetParentNode(parent_case);
+  sub_graph->SetParentGraph(parent_graph);
+  EXPECT_EQ(pass_manager.Run(sub_graph), SUCCESS);
+}
+
+/// graph with subgraph
+///            const
+///          /       \
+///        cast1  cast2
+///          \      /
+///             case
+///              |
+///           netoutput
+///        ...
+///       data1       data2
+///          \         /
+///            add
+TEST_F(UtestFuseDataNodesWithCommonInputPass, graph_with_subgraph2) {
+  PassManager pass_manager;
+  pass_manager.AddPass("FuseDataNodesWithCommonInputPass", new (std::nothrow) FuseDataNodesWithCommonInputPass);
+  ComputeGraphPtr parent_graph = std::make_shared<ComputeGraph>("parent_graph");
+  auto parent_const = MakeNode(parent_graph, 0, 1, "parent_const", "Const");
+  auto parent_cast1 = MakeNode(parent_graph, 1, 1, "parent_cast1", "Cast");
+  auto parent_cast2 = MakeNode(parent_graph, 1, 1, "parent_cast2", "Cast");
+  auto parent_case = MakeNode(parent_graph, 2, 1, "parent_case", "Case");
+  auto parent_output = MakeNode(parent_graph, 1, 0, "parent_output", "NetOutput");
+
+  GeTensorDesc tensor_desc(GeShape({1,3,224,224}), FORMAT_NCHW, DT_FLOAT);
+
+  parent_const->GetOpDesc()->UpdateOutputDesc(0, tensor_desc);
+  parent_cast1->GetOpDesc()->UpdateInputDesc(0, tensor_desc);
+  parent_cast1->GetOpDesc()->UpdateOutputDesc(0, tensor_desc);
+  parent_cast2->GetOpDesc()->UpdateInputDesc(0, tensor_desc);
+  parent_cast2->GetOpDesc()->UpdateOutputDesc(0, tensor_desc);
+  parent_case->GetOpDesc()->UpdateInputDesc(0, tensor_desc);
+  parent_case->GetOpDesc()->UpdateInputDesc(1, tensor_desc);
+  parent_case->GetOpDesc()->UpdateOutputDesc(0, tensor_desc);
+
+  GraphUtils::AddEdge(parent_const->GetOutDataAnchor(0), parent_cast1->GetInDataAnchor(0));
+  GraphUtils::AddEdge(parent_cast1->GetOutDataAnchor(0), parent_case->GetInDataAnchor(0));
+  GraphUtils::AddEdge(parent_const->GetOutDataAnchor(0), parent_cast2->GetInDataAnchor(0));
+  GraphUtils::AddEdge(parent_cast2->GetOutDataAnchor(0), parent_case->GetInDataAnchor(1));
+  GraphUtils::AddEdge(parent_case->GetOutDataAnchor(0), parent_output->GetInDataAnchor(0));
+
+  ComputeGraphPtr sub_graph = std::make_shared<ComputeGraph>("sub_graph");
+  auto data0 = MakeNode(parent_graph, 1, 1, "data0", "Data");
+  data0->GetOpDesc()->UpdateInputDesc(0, tensor_desc);
+  data0->GetOpDesc()->UpdateOutputDesc(0, tensor_desc);
+  auto data1 = MakeNode(parent_graph, 1, 1, "data1", "Data");
+  data1->GetOpDesc()->UpdateInputDesc(0, tensor_desc);
+  data1->GetOpDesc()->UpdateOutputDesc(0, tensor_desc);
+  (void)AttrUtils::SetInt(data0->GetOpDesc(), ATTR_NAME_PARENT_NODE_INDEX, 0);
+  (void)AttrUtils::SetInt(data1->GetOpDesc(), ATTR_NAME_PARENT_NODE_INDEX, 1);
+
+  sub_graph->SetParentNode(parent_case);
+  sub_graph->SetParentGraph(parent_graph);
+  EXPECT_EQ(pass_manager.Run(sub_graph), SUCCESS);
+}
+}  // namespace ge
diff --git a/tests/ut/ge/graph/passes/no_data_out_const_elimination_pass_unittest.cc b/tests/ut/ge/graph/passes/no_data_out_const_elimination_pass_unittest.cc
new file mode 100644
index 00000000..c102f5c2
--- /dev/null
+++ b/tests/ut/ge/graph/passes/no_data_out_const_elimination_pass_unittest.cc
@@ -0,0 +1,75 @@
+/**
+ * Copyright 2021 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "graph/passes/no_data_out_const_elimination_pass.h"
+
+#include <gtest/gtest.h>
+#include <string>
+#include <vector>
+#include <map>
+
+#include "common/ge_inner_error_codes.h"
+#include "graph/utils/graph_utils.h"
+
+namespace ge {
+
+class UtestNoDataOutConstEliminationPass : public testing::Test {
+protected:
+  void SetUp() {}
+  void TearDown() {}
+
+public:
+  NodePtr MakeNode(const ComputeGraphPtr &graph, uint32_t in_num, uint32_t out_num, string name, string type) {
+    GeTensorDesc test_desc(GeShape(), FORMAT_NCHW, DT_FLOAT);
+    auto op_desc = std::make_shared<OpDesc>(name, type);
+    for (auto i = 0; i < in_num; ++i) {
+      op_desc->AddInputDesc(test_desc);
+    }
+    for (auto i = 0; i < out_num; ++i) {
+      op_desc->AddOutputDesc(test_desc);
+    }
+    return graph->AddNode(op_desc);
+  }
+};
+
+/// graph with subgraph
+///       const1
+///          |(control)
+///        const2
+///          |
+///        output
+TEST_F(UtestNoDataOutConstEliminationPass, succ_graph1) {
+  ComputeGraphPtr graph = std::make_shared<ComputeGraph>("test");
+  auto const_node1 = MakeNode(graph, 0, 1, "const_node1", "Const");
+  auto const_node2 = MakeNode(graph, 1, 1, "const_node2", "Const");
+  auto output_node = MakeNode(graph, 1, 0, "output_node", "NetOutput");
+  GeTensorDesc tensor_desc(GeShape({1,3,224,224}), FORMAT_NCHW, DT_FLOAT);
+
+  const_node1->GetOpDesc()->UpdateOutputDesc(0, tensor_desc);
+  const_node2->GetOpDesc()->UpdateInputDesc(0, tensor_desc);
+  const_node2->GetOpDesc()->UpdateOutputDesc(0, tensor_desc);
+  output_node->GetOpDesc()->UpdateInputDesc(0, tensor_desc);
+
+  GraphUtils::AddEdge(const_node1->GetOutControlAnchor(), const_node2->GetInControlAnchor());
+  GraphUtils::AddEdge(const_node2->GetOutDataAnchor(0), output_node->GetInDataAnchor(0));
+
+  GEPass pass(graph);
+  NamesToPass node_pass;
+  NoDataOutConstEliminationPass no_data_out_const_elimination_pass;
+  node_pass.emplace_back("NoDataOutConstEliminationPass", &no_data_out_const_elimination_pass);
+  EXPECT_EQ(pass.Run(node_pass), SUCCESS);
+}
+}  // namespace ge