diff --git a/epmet-user/epmet-user-server/src/main/resources/mapper/IcNatDao.xml b/epmet-user/epmet-user-server/src/main/resources/mapper/IcNatDao.xml
index 16d15f05a2..049a806b55 100644
--- a/epmet-user/epmet-user-server/src/main/resources/mapper/IcNatDao.xml
+++ b/epmet-user/epmet-user-server/src/main/resources/mapper/IcNatDao.xml
@@ -49,14 +49,19 @@
             b.nat_address natAddress,
             b.test_tube_code testTubeCode
         FROM
-            ic_nat_relation a
+            (
+            select IC_NAT_ID, AGENCY_ID, USER_TYPE, IS_LOCAL_RESI_USER
+            from ic_nat_relation
+            WHERE AGENCY_ID = #{agencyId}
+            and DEL_FLAG = '0'
+            and customer_id = #{customerId}
+            <if test='null != isResiUser and "" != isResiUser'>
+                AND is_local_resi_user = #{isResiUser}
+            </if>
+            ) a
         INNER JOIN ic_nat b ON a.IC_NAT_ID = b.ID
         WHERE
-            a.DEL_FLAG = '0'
-        AND b.DEL_FLAG = '0'
-        AND a.customer_id = #{customerId}
-<!--            AND a.pids like concat('%', #{agencyId}, '%')-->
-            AND a.AGENCY_ID  = #{agencyId}
+        b.DEL_FLAG = '0'
         <if test='null != name and "" != name'>
             AND b.name like concat('%', #{name}, '%')
         </if>
@@ -78,9 +83,6 @@
         <if test='null != sampleEndTime and "" != sampleEndTime'>
             AND b.sample_time <![CDATA[ <= ]]> #{sampleEndTime}
         </if>
-        <if test='null != isResiUser and "" != isResiUser'>
-            AND a.is_local_resi_user = #{isResiUser}
-        </if>
         ORDER BY b.nat_time DESC, b.id ASC
     </select>
 
@@ -176,17 +178,17 @@
         </foreach>
     </select>
 
-    <!-- 获取关系和核酸检测 -->
+    <!-- 获取关系和核酸检测，这两个表数据量可能会很大，所以用嵌套子查询先过滤出一部分来，再关联 -->
     <select id="getRelationAndNat" resultType="com.epmet.dto.result.RelationAndNatResultDTO">
-        SELECT
-            r.ID AS relationId,
-            i.ID AS natId,
-            i.ID_CARD,
-            r.PIDS AS staffAgencyIdPath
-        FROM ic_nat_relation r
-        INNER JOIN ic_nat i ON i.ID = r.IC_NAT_ID AND i.DEL_FLAG = 0
-        WHERE r.DEL_FLAG = 0
-          AND r.USER_TYPE IN ('import')
+        SELECT r.ID   AS relationId,
+               i.ID   AS natId,
+               i.ID_CARD,
+               r.PIDS AS staffAgencyIdPath
+        FROM (SELECT ID, PIDS, IC_NAT_ID
+              FROM ic_nat_relation
+              WHERE DEL_FLAG = 0
+                AND USER_TYPE IN ('import')) r
+                 INNER JOIN ic_nat i ON i.ID = r.IC_NAT_ID AND i.DEL_FLAG = 0
     </select>
     <select id="getResiByIdCards" resultType="com.epmet.entity.IcResiUserEntity">
         SELECT * FROM ic_resi_user