diff --git a/examples/vision/detection/paddledetection/python/infer_yolov3.py b/examples/vision/detection/paddledetection/python/infer_yolov3.py
index 27a6fd16b..776d3ddba 100644
--- a/examples/vision/detection/paddledetection/python/infer_yolov3.py
+++ b/examples/vision/detection/paddledetection/python/infer_yolov3.py
@@ -34,9 +34,6 @@ def build_option(args):
 
     if args.use_trt:
         option.use_trt_backend()
-        option.set_trt_input_shape("image", [1, 3, 608, 608])
-        option.set_trt_input_shape("im_shape", [1, 2])
-        option.set_trt_input_shape("scale_factor", [1, 2])
     return option