diff --git a/example/post_training_quantization/pytorch_yolo_series/eval.py b/example/post_training_quantization/pytorch_yolo_series/eval.py
index 6c2462acf4a19e7402990847b7363d347972f7f1..498eb5f6ea8f27d6a10f95047527f110101533cc 100644
--- a/example/post_training_quantization/pytorch_yolo_series/eval.py
+++ b/example/post_training_quantization/pytorch_yolo_series/eval.py
@@ -51,8 +51,8 @@ def eval():
     val_program, feed_target_names, fetch_targets = load_inference_model(
         config["model_dir"].rstrip('/'),
         exe,
-        model_filename=config["model_filename"],
-        params_filename=config["params_filename"])
+        model_filename="model.pdmodel",
+        params_filename="model.pdiparams")
 
     bboxes_list, bbox_nums_list, image_id_list = [], [], []
     with tqdm(