diff --git a/remote_sync/bot.py b/remote_sync/bot.py
index 12cf36b..11ca4ec 100755
--- a/remote_sync/bot.py
+++ b/remote_sync/bot.py
@@ -2210,11 +2210,44 @@ class OpenClawDingTalkBot(ChatbotHandler):
             )
             response_text = response.text
             response.raise_for_status()
+            payload = {}
+            try:
+                payload = response.json()
+            except Exception:
+                payload = {}
+            if isinstance(payload, dict):
+                errcode = payload.get("errcode")
+                success = payload.get("success")
+                if (errcode is not None and str(errcode) not in {"0", ""}) or success is False:
+                    self.logger.error(
+                        "reply file business failed, errcode=%s payload=%s",
+                        errcode,
+                        str(payload)[:500],
+                    )
+                    return False
         except Exception as exc:
             self.logger.error("reply file failed, error=%s, response.text=%s", exc, response_text)
             return False
         return True
 
+    def _upload_excel_output_to_s3(self, file_path: str, filename: str) -> str:
+        if boto3 is None or BotoConfig is None:
+            return ""
+        if not (self.s3_bucket and self.s3_access_key and self.s3_secret_key):
+            return ""
+        try:
+            safe_name = self._normalize_file_name(filename or f"excel_{int(time.time())}.xlsx")
+            object_key = f"{self.s3_key_prefix}excel-output/{safe_name}"
+            self._upload_to_s3(
+                file_path,
+                object_key,
+                "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
+            )
+            return self._build_public_s3_url(object_key)
+        except Exception as exc:
+            self.logger.exception("upload excel output to s3 failed: %s", exc)
+            return ""
+
     def _run_excel_image_link_job(self, msg: ChatbotMessage, file_payload: dict) -> tuple[str, bool]:
         if not self.excel_link_feature_enabled:
             return "Excel 图片链接转图片功能未启用。", False
@@ -2289,6 +2322,7 @@ class OpenClawDingTalkBot(ChatbotHandler):
                     summary_line = line.replace("SUMMARY:", "").strip()
                     break
 
+            media_id = ""
             try:
                 with open(output_path, "rb") as fh:
                     media_content = fh.read()
@@ -2297,16 +2331,15 @@ class OpenClawDingTalkBot(ChatbotHandler):
                     filetype="file",
                     filename=output_name,
                     mimetype="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
-                )
+                ) or ""
             except Exception as exc:
                 self.logger.exception("upload converted excel failed")
-                return f"处理完成但上传失败：{exc}", False
 
-            if not media_id:
-                return "处理完成但上传媒体失败，请稍后重试。", False
-
-            sent = self._reply_file_by_media_id(msg, media_id)
+            sent = self._reply_file_by_media_id(msg, media_id) if media_id else False
             if not sent:
+                s3_url = self._upload_excel_output_to_s3(output_path, output_name)
+                if s3_url:
+                    return f"钉钉文件回传受限，已生成下载链接：{s3_url}", True
                 return "处理完成但回传文件失败，请稍后重试。", False
 
             summary_text = summary_line or "已完成图片回填。"