diff --git a/PaddleCV/object_detection/train.py b/PaddleCV/object_detection/train.py
index 0b660a94f201ce05a0273e8c0bf7d4c727620944..ebf969ef0655557feca405c3eb0e558c9588276d 100644
--- a/PaddleCV/object_detection/train.py
+++ b/PaddleCV/object_detection/train.py
@@ -179,6 +179,7 @@ def train(args,
                            predicate=if_exist)
 
     if parallel:
+        loss.persistable = True
         build_strategy = fluid.BuildStrategy()
         build_strategy.enable_inplace = True
         build_strategy.memory_optimize = True