diff --git a/tools/infer/predict_rec.py b/tools/infer/predict_rec.py
index 1989f524c21d519f879290bcc72bc1b282a93772..77dc82aad25bec5023367d051ec195001c4fd8e7 100755
--- a/tools/infer/predict_rec.py
+++ b/tools/infer/predict_rec.py
@@ -63,8 +63,9 @@ class TextRecognizer(object):
     def resize_norm_img(self, img, max_wh_ratio):
         imgC, imgH, imgW = self.rec_image_shape
         assert imgC == img.shape[2]
+        wh_ratio = max(max_wh_ratio, imgW * 1.0 / imgH)
         if self.character_type == "ch":
-            imgW = int((32 * max_wh_ratio))
+            imgW = int((32 * wh_ratio))
         h, w = img.shape[:2]
         ratio = w / float(h)
         if math.ceil(imgH * ratio) > imgW: