diff --git a/zh-cn/application-dev/reference/apis/js-apis-device-manager.md b/zh-cn/application-dev/reference/apis/js-apis-device-manager.md
index 02447024ee886830d790c4d5da3a38e4c3cd5509..f63f84c4df44be1f5cba595b76c257f8e66b4156 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-device-manager.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-device-manager.md
@@ -69,7 +69,6 @@ createDeviceManager(bundleName: string, callback: AsyncCallback<DeviceManager
 | UNKNOWN_TYPE | 0 | 未知设备 |
 
 
-
 ## DeviceInfo
 
 设备信息。