diff --git a/ge/graph/passes/subgraph_pass.cc b/ge/graph/passes/subgraph_pass.cc
index d8cc5676..88e661a7 100755
--- a/ge/graph/passes/subgraph_pass.cc
+++ b/ge/graph/passes/subgraph_pass.cc
@@ -146,11 +146,13 @@ Status SubgraphPass::SubgraphOutputNode(const ComputeGraphPtr &graph, const Node
     //   2. AtomicOp->NetOutput in subgraph
     //   3. OutputContinuesRequiredOp->NetOutput in subgraph
     //   4. Data->NetOutput in subgraph but parent_node is not while
+    //   5. While->NetOutput in known subgraph
     std::string op_type;
     bool insert_flag = NodeUtils::GetConstOpType(in_node, op_type) ||
                        IsAtomicRequired(in_node, peer_out_anchor->GetIdx()) || IsOutputContinuesRequired(in_node) ||
                        ((in_node->GetType() == DATA) && (kWhileOpTypes.count(graph->GetParentNode()->GetType()) == 0)) ||
-                         (NodeUtils::IsDynamicShape(node) && (kWhileOpTypes.count(in_node->GetType()) != 0));
+                       (!graph->GetGraphUnknownFlag() && NodeUtils::IsDynamicShape(node) &&
+                        (kWhileOpTypes.count(in_node->GetType()) != 0));
     if (insert_flag) {
       GELOGD("Insert MemcpyAsync node between %s and %s.", in_node->GetName().c_str(), node->GetName().c_str());
       std::string name = node->GetName() + "_input_" + std::to_string(in_data_anchor->GetIdx()) + "_Memcpy";