diff --git a/src/service/device_io_control_service.cpp b/src/service/device_io_control_service.cpp
index 8d38986..5c21907 100644
--- a/src/service/device_io_control_service.cpp
+++ b/src/service/device_io_control_service.cpp
@@ -346,6 +346,9 @@ void DeviceIoControlService::H2O2Sensor_updateSensorData(int32_t sensorid, repor
     sensor_data->sensorId   = data->sensorid;
     sensor_data->updatetime = zsys_get_ticket();
   }
+  if (sensor_data->h2o2 < 30) {
+    sensor_data->h2o2 = 0;
+  }
 }
 
 /*******************************************************************************