diff --git a/tests/ut/ge/hybrid/ge_hybrid_unittest.cc b/tests/ut/ge/hybrid/ge_hybrid_unittest.cc
index 60c0e883..f5a802a2 100644
--- a/tests/ut/ge/hybrid/ge_hybrid_unittest.cc
+++ b/tests/ut/ge/hybrid/ge_hybrid_unittest.cc
@@ -258,51 +258,75 @@ TEST_F(UtestGeHybrid, init_weight_success) {
 }
 
 TEST_F(UtestGeHybrid, unfold_subgraphs_success) {
-  ComputeGraphPtr merged_graph = nullptr;
-
-  ComputeGraphPtr sub_sub_graph1 = std::make_shared<ComputeGraph>("while_cond");
-  OpDescPtr sub_sub_graph_while_cond_data_op_desc = CreateOpDesc("cond_data", DATA);
-  NodePtr sub_sub_graph_while_cond_data_node = sub_sub_graph1->AddNode(sub_sub_graph_while_cond_data_op_desc);
-
-  ComputeGraphPtr sub_sub_graph2 = std::make_shared<ComputeGraph>("while_body");
-  /*OpDescPtr sub_sub_graph_while_body_const_op_desc = CreateOpDesc("body_const", CONSTANT);
-  NodePtr sub_sub_graph_while_body_const_node = sub_sub_graph2->AddNode(sub_sub_graph_while_body_const_op_desc);*/
-  OpDescPtr sub_sub_graph_while_body_data_op_desc = CreateOpDesc("body_data", DATA);
-  NodePtr sub_sub_graph_while_body_data_node = sub_sub_graph2->AddNode(sub_sub_graph_while_body_data_op_desc);
-  sub_sub_graph2->SetGraphUnknownFlag(true);
-  /*OpDescPtr sub_sub_graph_while_body_add_op_desc = CreateOpDesc("body_add", ADD);
-  NodePtr sub_sub_graph_while_body_add_node = sub_sub_graph2->AddNode(sub_sub_graph_while_body_add_node);
-  sub_sub_graph_while_body_add_node->AddLinkFrom(sub_sub_graph_while_body_data_node);
-  sub_sub_graph_while_body_add_node->AddLinkFrom(sub_sub_graph_while_body_const_node);*/
-
-  ComputeGraphPtr sub_graph = std::make_shared<ComputeGraph>("sub_graph");
-  OpDescPtr sub_graph_while_op_desc = CreateOpDesc("while", WHILE);
-  NodePtr sub_graph_while_node = sub_graph->AddNode(sub_graph_while_op_desc);
-  sub_graph->SetGraphUnknownFlag(true);
-  sub_graph_while_node->GetOpDesc()->AddSubgraphName("while_cond");
-  sub_graph_while_node->GetOpDesc()->AddSubgraphName("while_body");
-  sub_graph_while_node->GetOpDesc()->SetSubgraphInstanceName(0, "while_cond");
-  sub_graph_while_node->GetOpDesc()->SetSubgraphInstanceName(1, "while_body");
-
-  ComputeGraphPtr root_graph = std::make_shared<ComputeGraph>("root_graph");
-  auto partitioned_call_op_desc = MakeShared<OpDesc>("partitioned_call", PARTITIONEDCALL);
-  auto partitioned_call_node = root_graph->AddNode(partitioned_call_op_desc);
-  partitioned_call_node->GetOpDesc()->AddSubgraphName("sub_graph");
-  partitioned_call_node->GetOpDesc()->SetSubgraphInstanceName(0, "sub_graph");
-
-  root_graph->AddSubGraph(sub_sub_graph1);
-  root_graph->AddSubGraph(sub_sub_graph2);
-  sub_sub_graph1->SetParentGraph(root_graph);
-  sub_sub_graph2->SetParentGraph(root_graph);
-  sub_sub_graph1->SetParentNode(sub_graph_while_node);
-  sub_sub_graph2->SetParentNode(sub_graph_while_node);
-
-  root_graph->AddSubGraph(sub_graph);
-  sub_graph->SetParentNode(partitioned_call_node);
-  sub_graph->SetParentGraph(root_graph);
-
-  GeRootModelPtr root_model = MakeShared<ge::GeRootModel>(root_graph);
-  HybridModel hybrid_model(root_model);
-  HybridModelBuilder hybrid_model_builder(hybrid_model);
-  EXPECT_EQ(hybrid_model_builder.UnfoldSubgraphs(root_graph, merged_graph), SUCCESS);
+ComputeGraphPtr merged_graph = nullptr;
+
+ComputeGraphPtr sub_sub_graph1 = std::make_shared<ComputeGraph>("while_cond");
+OpDescPtr sub_sub_graph_while_cond_data_op_desc = CreateOpDesc("cond_data", DATA);
+NodePtr sub_sub_graph_while_cond_data_node = sub_sub_graph1->AddNode(sub_sub_graph_while_cond_data_op_desc);
+
+ComputeGraphPtr sub_sub_graph2 = std::make_shared<ComputeGraph>("while_body");
+/*OpDescPtr sub_sub_graph_while_body_const_op_desc = CreateOpDesc("body_const", CONSTANT);
+NodePtr sub_sub_graph_while_body_const_node = sub_sub_graph2->AddNode(sub_sub_graph_while_body_const_op_desc);*/
+OpDescPtr sub_sub_graph_while_body_data_op_desc = CreateOpDesc("body_data", DATA);
+NodePtr sub_sub_graph_while_body_data_node = sub_sub_graph2->AddNode(sub_sub_graph_while_body_data_op_desc);
+sub_sub_graph2->SetGraphUnknownFlag(true);
+/*OpDescPtr sub_sub_graph_while_body_add_op_desc = CreateOpDesc("body_add", ADD);
+NodePtr sub_sub_graph_while_body_add_node = sub_sub_graph2->AddNode(sub_sub_graph_while_body_add_node);
+sub_sub_graph_while_body_add_node->AddLinkFrom(sub_sub_graph_while_body_data_node);
+sub_sub_graph_while_body_add_node->AddLinkFrom(sub_sub_graph_while_body_const_node);*/
+
+ComputeGraphPtr sub_graph = std::make_shared<ComputeGraph>("sub_graph");
+OpDescPtr sub_graph_while_op_desc = CreateOpDesc("while", WHILE);
+NodePtr sub_graph_while_node = sub_graph->AddNode(sub_graph_while_op_desc);
+sub_graph->SetGraphUnknownFlag(true);
+sub_graph_while_node->GetOpDesc()->AddSubgraphName("while_cond");
+sub_graph_while_node->GetOpDesc()->AddSubgraphName("while_body");
+sub_graph_while_node->GetOpDesc()->SetSubgraphInstanceName(0, "while_cond");
+sub_graph_while_node->GetOpDesc()->SetSubgraphInstanceName(1, "while_body");
+
+ComputeGraphPtr root_graph = std::make_shared<ComputeGraph>("root_graph");
+auto partitioned_call_op_desc = MakeShared<OpDesc>("partitioned_call", PARTITIONEDCALL);
+auto partitioned_call_node = root_graph->AddNode(partitioned_call_op_desc);
+partitioned_call_node->GetOpDesc()->AddSubgraphName("sub_graph");
+partitioned_call_node->GetOpDesc()->SetSubgraphInstanceName(0, "sub_graph");
+
+root_graph->AddSubGraph(sub_sub_graph1);
+root_graph->AddSubGraph(sub_sub_graph2);
+sub_sub_graph1->SetParentGraph(root_graph);
+sub_sub_graph2->SetParentGraph(root_graph);
+sub_sub_graph1->SetParentNode(sub_graph_while_node);
+sub_sub_graph2->SetParentNode(sub_graph_while_node);
+
+root_graph->AddSubGraph(sub_graph);
+sub_graph->SetParentNode(partitioned_call_node);
+sub_graph->SetParentGraph(root_graph);
+
+GeRootModelPtr root_model = MakeShared<ge::GeRootModel>(root_graph);
+HybridModel hybrid_model(root_model);
+HybridModelBuilder hybrid_model_builder(hybrid_model);
+
+// subgraph num before unfold: 1
+EXPECT_EQ(root_graph->GetAllSubgraphs().size(), 3);
+// num of nodes in root_graph before unfold: 1, name: partitioned_call
+EXPECT_EQ(root_graph->GetDirectNodesSize(), 1);
+EXPECT_EQ(root_graph->GetDirectNode().at(0)->GetName(), "partitioned_call");
+// two sub_sub_graphs: while cond & while body, their parent graph is "subgraph" before unfold
+EXPECT_EQ(sub_sub_graph1->GetParentGraph()->GetName(), "root_graph");
+EXPECT_EQ(sub_sub_graph1->GetParentGraph()->GetName(), "root_graph");
+// node "cond_data" & "body_data" has owner compute graph "subgraph" before unfold
+EXPECT_EQ(sub_graph_while_node->GetOwnerComputeGraph()->GetName(), "sub_graph");
+
+// unfold success
+EXPECT_EQ(hybrid_model_builder.UnfoldSubgraphs(root_graph, merged_graph), SUCCESS);
+
+// subgraph num after unfold: 0
+EXPECT_EQ(merged_graph->GetAllSubgraphs().size(), 2);
+// num of nodes in MergedGraph after unfold: 1, name: while
+EXPECT_EQ(merged_graph->GetDirectNodesSize(), 1);
+EXPECT_EQ(merged_graph->GetDirectNode().at(0)->GetName(), "while");
+// two sub_sub_graphs: while cond & while body, their parent graph is "MergedGraph" after unfold
+EXPECT_EQ(sub_sub_graph1->GetParentGraph()->GetName(), "MergedGraph" );
+EXPECT_EQ(sub_sub_graph1->GetParentGraph()->GetName(), "MergedGraph");
+// node "cond_data" & "body_data" has owner compute graph "MergedGraph" before unfold
+EXPECT_EQ(sub_graph_while_node->GetOwnerComputeGraph()->GetName(), "MergedGraph");
 }