diff --git a/PaddleCV/object_detection/train.py b/PaddleCV/object_detection/train.py
index 6fb7ce0236dc63f39de597788bc425f8dfa5ae6d..0b660a94f201ce05a0273e8c0bf7d4c727620944 100644
--- a/PaddleCV/object_detection/train.py
+++ b/PaddleCV/object_detection/train.py
@@ -179,8 +179,11 @@ def train(args,
                            predicate=if_exist)
 
     if parallel:
+        build_strategy = fluid.BuildStrategy()
+        build_strategy.enable_inplace = True
+        build_strategy.memory_optimize = True
         train_exe = fluid.ParallelExecutor(main_program=train_prog,
-            use_cuda=use_gpu, loss_name=loss.name)
+            use_cuda=use_gpu, loss_name=loss.name, build_strategy=build_strategy)
     train_reader = reader.train(data_args,
                                 train_file_list,
                                 batch_size_per_device,