diff --git a/ems-system/src/main/resources/mapper/ems/EmsPcsDataMapper.xml b/ems-system/src/main/resources/mapper/ems/EmsPcsDataMapper.xml
index b6f0bba..ecdedb8 100644
--- a/ems-system/src/main/resources/mapper/ems/EmsPcsDataMapper.xml
+++ b/ems-system/src/main/resources/mapper/ems/EmsPcsDataMapper.xml
@@ -382,12 +382,14 @@
     </select>
 
     <select id="getSiteRunningHeadInfo" parameterType="String" resultType="com.xzzn.ems.domain.vo.SiteMonitorRunningHeadInfoVo">
-        SELECT
-            SUM(t.total_active_power)        as totalActivePower,
-            SUM(t.total_reactive_power)      as totalReactivePower,
-            sum(t.daily_ac_charge_energy)    as dayChargedCap,
-            sum(t.daily_ac_discharge_energy) as dayDisChargedCap
+        SELECT SUM(pd.total_active_power)        as totalActivePower,
+               SUM(pd.total_reactive_power)      as totalReactivePower,
+               sum(pd.daily_ac_charge_energy)    as dayChargedCap,
+               sum(pd.daily_ac_discharge_energy) as dayDisChargedCap
         FROM (
+                 SELECT
+                     t.*, ROW_NUMBER() OVER(PARTITION BY t.device_id ORDER BY t.data_update_time desc) AS rn
+                 FROM (
                  SELECT p.device_id, MAX(p.data_update_time) AS max_update_time
                  FROM ems_pcs_data p
                  where p.site_id = #{siteId}
@@ -395,6 +397,8 @@
              ) latest inner join ems_pcs_data t ON latest.device_id = t.device_id
             AND latest.max_update_time = t.data_update_time
             AND t.site_id = #{siteId}
+             ) AS pd
+        WHERE rn = 1;
     </select>
 
     <select id="getElectDataList" resultType="com.xzzn.ems.domain.vo.ElectricIndexList">