diff --git a/project/src/main/resources/mapper/SimulationTaskExtraMapper.xml b/project/src/main/resources/mapper/SimulationTaskExtraMapper.xml
new file mode 100644
index 00000000..197defb5
--- /dev/null
+++ b/project/src/main/resources/mapper/SimulationTaskExtraMapper.xml
@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.sdm.project.dao.SimulationTaskExtraMapper">
+
+    <!-- 批量新增任务扩展属性 -->
+    <insert id="addTaskExtraBatch">
+        insert into simulation_task_extra (task_id, property_name, property_value, value_type, property_class, creator, create_time) values
+        <foreach collection='list' item='taskExtra' index='index' separator=','>
+            (#{taskExtra.nodeId}, #{taskExtra.propertyName}, #{taskExtra.propertyValue}, #{taskExtra.valueType}, #{taskExtra.propertyClass}, #{taskExtra.creator}, #{taskExtra.createTime})
+        </foreach>
+    </insert>
+
+    <!-- 更新任务扩展属性（支持设置null值） -->
+    <update id="editTaskExtraWithNull">
+        update simulation_task_extra
+        <trim prefix="set" suffixOverrides=",">
+            <if test="taskExtra.propertyName != null and taskExtra.propertyName != ''">
+                property_name = #{taskExtra.propertyName},
+            </if>
+            <choose>
+                <when test="taskExtra.propertyValue != null">
+                    property_value = #{taskExtra.propertyValue},
+                </when>
+                <otherwise>
+                    property_value = null,
+                </otherwise>
+            </choose>
+            <if test="taskExtra.valueType != null and taskExtra.valueType != ''">
+                value_type = #{taskExtra.valueType},
+            </if>
+            <if test="taskExtra.propertyClass != null and taskExtra.propertyClass != ''">
+                property_class = #{taskExtra.propertyClass},
+            </if>
+            <if test="taskExtra.updater != null and taskExtra.updater != ''">
+                updater = #{taskExtra.updater},
+            </if>
+            <if test="taskExtra.updateTime != null and taskExtra.updateTime != ''">
+                update_time = #{taskExtra.updateTime},
+            </if>
+        </trim>
+        where id = #{taskExtra.id}
+    </update>
+
+</mapper>