diff --git a/deploy/python/infer.py b/deploy/python/infer.py
index 99d3b3f44d1eafd8a6560aa5c85c6531d6cdb649..ec2ab48dad3306ef649cbea85a934603c81fb8a7 100644
--- a/deploy/python/infer.py
+++ b/deploy/python/infer.py
@@ -12,7 +12,16 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import os
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import os, sys
+# add python path of PadleDetection to sys.path
+parent_path = os.path.abspath(os.path.join(__file__, *(['..'] * 3)))
+if parent_path not in sys.path:
+    sys.path.append(parent_path)
+
 import argparse
 import time
 import yaml