diff --git a/deploy/cpp_infer/src/preprocess_op.cpp b/deploy/cpp_infer/src/preprocess_op.cpp
index 494b774ad0b2ecf73e555b2c31c250b7b0730c65..1d3e31a14888969b0b56398bdcb9925d03e91cfe 100644
--- a/deploy/cpp_infer/src/preprocess_op.cpp
+++ b/deploy/cpp_infer/src/preprocess_op.cpp
@@ -88,7 +88,7 @@ void ResizeImgType0::Run(const cv::Mat &img, cv::Mat &resize_img,
   else if (resize_w / 32 < 1 + 1e-5)
     resize_w = 32;
   else
-    resize_w = (resize_w / 32 - 1) * 32;
+    resize_w = resize_w / 32 * 32;
 
   cv::resize(img, resize_img, cv::Size(resize_w, resize_h));