diff --git a/monitor.py b/monitor.py
index 72ce99b..4607cac 100644
--- a/monitor.py
+++ b/monitor.py
@@ -1249,7 +1249,7 @@ class MessageMonitor:
                 _dbg_path = os.path.join(script_dir, f"ocr_debug_qq_{ts}.png")
                 im.save(_dbg_path)
                 logger.debug(f"[qq] 调试截图: {_dbg_path}")
-                _clean_old_ocr_debug(script_dir, keep=60)
+                _clean_old_ocr_debug(script_dir, keep=6)
             except Exception as e:
                 logger.warning(f"[qq] 调试截图保存失败: {e} (路径: {os.path.join(script_dir, 'ocr_debug_qq_*.png')})")
 
@@ -1352,7 +1352,7 @@ class MessageMonitor:
                 im.save(_dbg_path)
                 logger.debug(f"[wechat] 调试截图: {_dbg_path}")
                 # 清理 ocr_debug_* 调试图（unified pool）
-                _clean_old_ocr_debug(script_dir, keep=60)
+                _clean_old_ocr_debug(script_dir, keep=6)
             except Exception as e:
                 logger.warning(f"[wechat] 调试截图保存失败: {e} (路径: {os.path.join(script_dir, 'ocr_debug_wx_*.png')})")