diff --git a/services/kdocs_uploader.py b/services/kdocs_uploader.py
index b4d31a1..281c37c 100644
--- a/services/kdocs_uploader.py
+++ b/services/kdocs_uploader.py
@@ -542,6 +542,15 @@ class KDocsUploader:
                 pass
             return {"success": False, "error": self._last_error}
 
+        try:
+            ts = int(time.time())
+            path = f"data/kdocs_last_qr_{ts}.png"
+            with open(path, "wb") as handle:
+                handle.write(qr_image)
+            logger.info(f"[KDocs] 已保存二维码截图: {path} ({len(qr_image)} bytes)")
+        except Exception as e:
+            logger.warning(f"[KDocs] 保存二维码截图失败: {e}")
+
         self._last_qr_image = qr_image
         self._login_required = True
         return {