diff --git a/tools/infer/utility.py b/tools/infer/utility.py
index 22ffe4d6c223ca64cd7a5d0a6bcad4cd307e89b1..762db868f58d11aaa626a2e55591d47bfa9536a9 100644
--- a/tools/infer/utility.py
+++ b/tools/infer/utility.py
@@ -271,7 +271,7 @@ def create_predictor(args, mode, logger):
             elif mode == "rec":
                 if args.rec_algorithm != "CRNN":
                     use_dynamic_shape = False
-                imgH = int(args.rec_image_shape.split(',')[1])
+                imgH = int(args.rec_image_shape.split(',')[-2])
                 min_input_shape = {"x": [1, 3, imgH, 10]}
                 max_input_shape = {"x": [args.rec_batch_num, 3, imgH, 1536]}
                 opt_input_shape = {"x": [args.rec_batch_num, 3, imgH, 320]}