diff --git a/tools/export_serving_model.py b/tools/export_serving_model.py
index 1406d81d0a1ff0fc591e8b29f7ab2c5078c8b220..6050e785c2d7641d56a2e07fc8de61368d86d878 100644
--- a/tools/export_serving_model.py
+++ b/tools/export_serving_model.py
@@ -16,7 +16,11 @@ from __future__ import absolute_import
 from __future__ import division
 from __future__ import print_function
 
-import os
+import os, sys
+# add python path of PadleDetection to sys.path
+parent_path = os.path.abspath(os.path.join(__file__, *(['..'] * 2)))
+if parent_path not in sys.path:
+    sys.path.append(parent_path)
 
 from paddle import fluid