diff --git a/zh-cn/application-dev/reference/apis/js-apis-inputdevice.md b/zh-cn/application-dev/reference/apis/js-apis-inputdevice.md
index 0f03dcaf28bafba9f08038e62e8877b376e8e3cf..a127eda9cd054c9887d18b5a2bd42d260ece059a 100755
--- a/zh-cn/application-dev/reference/apis/js-apis-inputdevice.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-inputdevice.md
@@ -42,7 +42,7 @@ inputDevice.on("change", (data)=>{
             // 监听物理键盘已连接。
             isPhysicalKeyboardExist = true;
         } else if (ret == 2 && data.type == 'remove') {
-            // 监听物理键盘已断
+            // 监听物理键盘已断开。
             isPhysicalKeyboardExist = false;
         }
     });