diff --git a/tools/infer/predict_det.py b/tools/infer/predict_det.py
index 6347ca6dc719f0d489736dbf285eedd775d3790e..ff3fb0d5f1070dedbf5d5457afc7bb97e443face 100755
--- a/tools/infer/predict_det.py
+++ b/tools/infer/predict_det.py
@@ -74,7 +74,7 @@ class TextDetector(object):
         elif self.det_algorithm == "SAST":
             pre_process_list[0] = {
                 'DetResizeForTest': {
-                    'resize_long': args.det_limit_side_len
+                    'resize_long': 1536
                 }
             }
             postprocess_params['name'] = 'SASTPostProcess'