diff --git a/fastbee-service/fastbee-iot-service/src/main/resources/mapper/iot/NgFlowDeviceDataMapper.xml b/fastbee-service/fastbee-iot-service/src/main/resources/mapper/iot/NgFlowDeviceDataMapper.xml
index 3034890..a81e378 100644
--- a/fastbee-service/fastbee-iot-service/src/main/resources/mapper/iot/NgFlowDeviceDataMapper.xml
+++ b/fastbee-service/fastbee-iot-service/src/main/resources/mapper/iot/NgFlowDeviceDataMapper.xml
@@ -30,6 +30,7 @@
             <if test="saveTime != null "> and save_time = #{saveTime}</if>
             <if test="deptId != null "> and dept_id = #{deptId}</if>
         </where>
+        order by real_time desc
     </select>
 
     <select id="selectNgFlowDeviceDataById" parameterType="Long" resultMap="NgFlowDeviceDataResult">