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 a2b19045d6c254a6f11e63ddab9b150f403f8c28..adc870047fb3b5634af8fa28d49861d23bd72194 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
@@ -430,7 +430,7 @@ unAuthenticateDevice(deviceInfo: DeviceInfo): void
 
 - 示例：
   ```js
-  dmInstance.unAuthenticateDevice(deviceinfo);
+  dmInstance.unAuthenticateDevice(deviceInfo);
   ```