diff --git a/deploy/cpp_infer/src/utility.cpp b/deploy/cpp_infer/src/utility.cpp
index 4bfc1d091d6124b10c79032beb702ba8727210fc..251184b91bb8efed4b58bbf2bc3d11ea6a1bf916 100644
--- a/deploy/cpp_infer/src/utility.cpp
+++ b/deploy/cpp_infer/src/utility.cpp
@@ -268,11 +268,12 @@ cv::Mat Utility::crop_image(cv::Mat &img, std::vector<int> &area) {
 
 void Utility::sorted_boxes(std::vector<OCRPredictResult> &ocr_result) {
   std::sort(ocr_result.begin(), ocr_result.end(), Utility::comparison_box);
-
-  for (int i = 0; i < ocr_result.size() - 1; i++) {
-    if (abs(ocr_result[i + 1].box[0][1] - ocr_result[i].box[0][1]) < 10 &&
-        (ocr_result[i + 1].box[0][0] < ocr_result[i].box[0][0])) {
-      std::swap(ocr_result[i], ocr_result[i + 1]);
+  if (ocr_result.size() > 0) {
+    for (int i = 0; i < ocr_result.size() - 1; i++) {
+      if (abs(ocr_result[i + 1].box[0][1] - ocr_result[i].box[0][1]) < 10 &&
+          (ocr_result[i + 1].box[0][0] < ocr_result[i].box[0][0])) {
+        std::swap(ocr_result[i], ocr_result[i + 1]);
+      }
     }
   }
 }