diff --git a/ruoyi-generator/src/main/resources/vm/xml/mapper.xml.vm b/ruoyi-generator/src/main/resources/vm/xml/mapper.xml.vm
index 93963ea3b..6d0954e02 100644
--- a/ruoyi-generator/src/main/resources/vm/xml/mapper.xml.vm
+++ b/ruoyi-generator/src/main/resources/vm/xml/mapper.xml.vm
@@ -12,12 +12,12 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 #if($table.sub)
 
     <resultMap id="${ClassName}${subClassName}Result" type="${ClassName}" extends="${ClassName}Result">
-        <collection property="${subclassName}List" notNullColumn="${subTable.pkColumn.columnName}" javaType="java.util.List" resultMap="${subClassName}Result" />
+        <collection property="${subclassName}List" notNullColumn="sub_${subTable.pkColumn.columnName}" javaType="java.util.List" resultMap="${subClassName}Result" />
     </resultMap>
 
     <resultMap type="${subClassName}" id="${subClassName}Result">
 #foreach ($column in $subTable.columns)
-        <result property="${column.javaField}"    column="${column.columnName}"    />
+        <result property="${column.javaField}"    column="sub_${column.columnName}"    />
 #end
     </resultMap>
 #end
@@ -64,7 +64,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
         where ${pkColumn.columnName} = #{${pkColumn.javaField}}
 #elseif($table.sub)
         select#foreach($column in $columns) a.$column.columnName#if($velocityCount != $columns.size()),#end#end,
-           #foreach($column in $subTable.columns) b.$column.columnName#if($velocityCount != $subTable.columns.size()),#end#end
+           #foreach($column in $subTable.columns) b.$column.columnName as sub_$column.columnName#if($velocityCount != $subTable.columns.size()),#end#end
 
         from ${tableName} a
         left join ${subTableName} b on b.${subTableFkName} = a.${pkColumn.columnName}