diff --git a/ge/graph/passes/memcpy_addr_async_pass.cc b/ge/graph/passes/memcpy_addr_async_pass.cc
index aff89f35..e8e4ebd8 100755
--- a/ge/graph/passes/memcpy_addr_async_pass.cc
+++ b/ge/graph/passes/memcpy_addr_async_pass.cc
@@ -25,15 +25,15 @@
 namespace ge {
 Status MemcpyAddrAsyncPass::Run(ComputeGraphPtr graph) {
   GE_CHECK_NOTNULL(graph);
-  for (const auto &node : graph->GetAllNodes()) {
-    if (node->GetType() == STREAMSWITCH) {
-      auto sub_graph = node->GetOwnerComputeGraph();
-      if (sub_graph != nullptr && !sub_graph->GetGraphUnknownFlag()) {
-        GE_CHK_STATUS_RET(AddMemcpyAsyncNode(node), "Add memcpyasync node failed in known subgraph.");
+  if (graph->GetGraphUnknownFlag()) {
+    for (const auto &node : graph->GetAllNodes()) {
+      if (node->GetType() == STREAMSWITCH) {
+        auto sub_graph = node->GetOwnerComputeGraph();
+        if (sub_graph != nullptr && !sub_graph->GetGraphUnknownFlag()) {
+          GE_CHK_STATUS_RET(AddMemcpyAsyncNode(node), "Add memcpyasync node failed in known subgraph.");
+        }
       }
     }
-  }
-  if (graph->GetGraphUnknownFlag()) {
     GELOGD("Graph[%s] is unknown graph, skip.", graph->GetName().c_str());
     return SUCCESS;
   }
diff --git a/tests/ut/ge/CMakeLists.txt b/tests/ut/ge/CMakeLists.txt
index afe2f2b9..e957d119 100755
--- a/tests/ut/ge/CMakeLists.txt
+++ b/tests/ut/ge/CMakeLists.txt
@@ -715,6 +715,7 @@ set(PASS_TEST_FILES
     "graph/passes/mark_node_unknown_shape_pass_unittest.cc"
     "graph/passes/reshape_recovery_pass_unittest.cc"
     "graph/passes/cast_remove_pass_unittest.cc"
+    "graph/passes/memcpy_addr_async_unittest.cc"
 )
 
 set(KERNEL_TEST_FILES
diff --git a/tests/ut/ge/graph/passes/memcpy_addr_async_unittest.cc b/tests/ut/ge/graph/passes/memcpy_addr_async_unittest.cc
new file mode 100644
index 00000000..e5bc450e
--- /dev/null
+++ b/tests/ut/ge/graph/passes/memcpy_addr_async_unittest.cc
@@ -0,0 +1,47 @@
+/**
+ * Copyright 2019-2020 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 <gtest/gtest.h>
+#include <cstdint>
+#include <memory>
+#include <string>
+
+#define private public
+#include "graph/passes/memcpy_addr_async_pass.h"
+#include "common/ge_inner_error_codes.h"
+#include "inc/pass_manager.h"
+#undef private
+
+namespace ge {
+class UtestMemcpyAddrAsyncPass : public testing::Test {
+ protected:
+  void SetUp() {}
+  void TearDown() {}
+};
+
+TEST_F(UtestMemcpyAddrAsyncPass, run) {
+  ge::ComputeGraphPtr graph = std::make_shared<ge::ComputeGraph>("default");
+  ge::OpDescPtr op = std::make_shared<ge::OpDesc>();
+  op->SetType(STREAMSWITCH);
+  op->SetName("stream_switch");
+  op->AddOutputDesc(ge::GeTensorDesc());
+  ge::NodePtr node = graph->AddNode(op);
+  graph->SetGraphUnknownFlag(true);
+  MemcpyAddrAsyncPass pass;
+  Status ret = pass.Run(graph);
+  EXPECT_EQ(ret, SUCCESS);
+}
+}  // namespace ge