diff --git a/paddle/fluid/framework/block_desc.cc b/paddle/fluid/framework/block_desc.cc
index 1b6f656a006489485a55b5c13b5e2de93c3da0ed..fd409ed4c0f7a504686765909e9c71692aab8824 100644
--- a/paddle/fluid/framework/block_desc.cc
+++ b/paddle/fluid/framework/block_desc.cc
@@ -134,6 +134,11 @@ OpDesc *BlockDesc::PrependOp() {
   return ops_.front().get();
 }
 
+void BlockDesc::PrependAllocatedOp(std::unique_ptr<OpDesc> &&op_desc) {
+  need_update_ = true;
+  ops_.emplace_front(std::move(op_desc));
+}
+
 OpDesc *BlockDesc::InsertOp(size_t index) {
   need_update_ = true;
   auto it = ops_.begin() + index;
diff --git a/paddle/fluid/framework/block_desc.h b/paddle/fluid/framework/block_desc.h
index eef19c4f09c60b9df18f154c85c421f5bff9413f..600601669c5d56a3ffc2fb9c804ffad5fde58f0b 100644
--- a/paddle/fluid/framework/block_desc.h
+++ b/paddle/fluid/framework/block_desc.h
@@ -88,6 +88,8 @@ class BlockDesc {
 
   OpDesc *PrependOp();
 
+  void PrependAllocatedOp(std::unique_ptr<OpDesc> &&op_desc);
+
   OpDesc *InsertOp(size_t index);
 
   /*