diff --git a/deploy/cpp_infer/src/preprocess_op.cpp b/deploy/cpp_infer/src/preprocess_op.cpp
index 494b774a..cdb20c31 100644
--- a/deploy/cpp_infer/src/preprocess_op.cpp
+++ b/deploy/cpp_infer/src/preprocess_op.cpp
@@ -81,14 +81,14 @@ void ResizeImgType0::Run(const cv::Mat &img, cv::Mat &resize_img,
   else if (resize_h / 32 < 1 + 1e-5)
     resize_h = 32;
   else
-    resize_h = (resize_h / 32 - 1) * 32;
+    resize_h = (resize_h / 32) * 32;
 
   if (resize_w % 32 == 0)
     resize_w = resize_w;
   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));