diff --git a/backend/roomroot-jwgl/src/main/java/com/roomroot/jwgl/mapper/JYSBMapper.xml b/backend/roomroot-jwgl/src/main/java/com/roomroot/jwgl/mapper/JYSBMapper.xml
index bdbcd5cb..dd38b553 100644
--- a/backend/roomroot-jwgl/src/main/java/com/roomroot/jwgl/mapper/JYSBMapper.xml
+++ b/backend/roomroot-jwgl/src/main/java/com/roomroot/jwgl/mapper/JYSBMapper.xml
@@ -37,6 +37,7 @@
         <if test="jysb.ty != null and jysb.ty != ''">
             AND 停用 = #{jysb.ty}
         </if>
+        ORDER BY CAST(序号 AS INTEGER) NULLS LAST, 教研室代号
     </select>
 
 </mapper>