diff --git a/yudao-module-iot/yudao-module-iot-biz/src/main/resources/mapper/device/IotDeviceMessageMapper.xml b/yudao-module-iot/yudao-module-iot-biz/src/main/resources/mapper/device/IotDeviceMessageMapper.xml
index bc9da9ec59..deef23b5c7 100644
--- a/yudao-module-iot/yudao-module-iot-biz/src/main/resources/mapper/device/IotDeviceMessageMapper.xml
+++ b/yudao-module-iot/yudao-module-iot-biz/src/main/resources/mapper/device/IotDeviceMessageMapper.xml
@@ -103,7 +103,7 @@
                 AND ts <= #{endTime}
             </if>
         </where>
-        GROUP BY time
+        GROUP BY TIMETRUNCATE(ts, 1h)
     </select>
 
 </mapper>
\ No newline at end of file