diff --git a/ppocr/postprocess/picodet_postprocess.py b/ppocr/postprocess/picodet_postprocess.py
index 9189c8ef5d2..1852e188091 100644
--- a/ppocr/postprocess/picodet_postprocess.py
+++ b/ppocr/postprocess/picodet_postprocess.py
@@ -292,6 +292,7 @@ def __call__(self, ori_img, img, preds):
                         key=lambda x: x[1]["score"],
                         reverse=True,
                     )[0][0]
-                duplicate_idx.extend([x for x in overlaps if x != keep])
+                if keep != i:
+                    duplicate_idx.append(i)
         results = [x for i, x in enumerate(results) if i not in duplicate_idx]
         return results