diff --git a/zh-cn/application-dev/js-reference/apis/js-apis-sensor.md b/zh-cn/application-dev/js-reference/apis/js-apis-sensor.md
index 7ad6e15939e45b23e20b6d92fdd7777fd0b948fa..54657bc27577b2cd75baaf20091a628bdc9b4efd 100644
--- a/zh-cn/application-dev/js-reference/apis/js-apis-sensor.md
+++ b/zh-cn/application-dev/js-reference/apis/js-apis-sensor.md
@@ -2055,7 +2055,7 @@ sensor.once(sensor.SensorType.SENSOR_TYPE_ID_PROXIMITY, function(error, data) {
 );
 ```
 
-## senor.once\(SensorType.SENSOR\_TYPE\_ID\_HUMIDITY\)<a name="section481181811512"></a>
+## sensor.once\(SensorType.SENSOR\_TYPE\_ID\_HUMIDITY\)<a name="section481181811512"></a>
 
 once\(type: SensorType.SENSOR\_TYPE\_ID\_HUMIDITY, callback: AsyncCallback<HumidityResponse\>\): void