diff --git a/m2pool-modules/m2pool-pool/src/main/resources/mapper/pool/PoolMapper.xml b/m2pool-modules/m2pool-pool/src/main/resources/mapper/pool/PoolMapper.xml
index 51deb1a..dc03965 100644
--- a/m2pool-modules/m2pool-pool/src/main/resources/mapper/pool/PoolMapper.xml
+++ b/m2pool-modules/m2pool-pool/src/main/resources/mapper/pool/PoolMapper.xml
@@ -406,7 +406,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
     </select>
 
     <select id="getNowPoolDailyPower" resultType="java.lang.Double">
-        select sum(mhs30m) from ${table} group by `date`  order by `date` desc limit 1;
+        select sum(mhs30m) from ${table} where `date` >= DATE_SUB(NOW(), INTERVAL 30 MINUTE) group by `date`  order by `date` desc limit 1;
     </select>
 
     <select id="get24hAccountPowerListByAccount" resultType="com.m2pool.pool.dto.PowerLineDto">