diff --git a/src/main/java/com/dreamchaser/depository_manage/entity/SplitInfo.java b/src/main/java/com/dreamchaser/depository_manage/entity/SplitInfo.java
new file mode 100644
index 00000000..2e5a5cbf
--- /dev/null
+++ b/src/main/java/com/dreamchaser/depository_manage/entity/SplitInfo.java
@@ -0,0 +1,39 @@
+package com.dreamchaser.depository_manage.entity;
+
+import lombok.Data;
+
+/**
+ * 拆单基础信息
+ */
+@Data
+public class SplitInfo {
+    /**
+     * 拆单id
+     */
+    private Integer id;
+    /**
+     * 物料id
+     */
+    private Integer mid;
+    /**
+     * 旧计量单位
+     */
+    private String oldUnit;
+    /**
+     * 新计量单位
+     */
+    private String newUnit;
+    /**
+     * 新旧单位映射数
+     */
+    private Integer quantity;
+    /**
+     * 父级id
+     */
+    private Integer parentId;
+
+    /**
+     * 状态：1启用2禁用3删除
+     */
+    private Integer state;
+}
diff --git a/src/main/java/com/dreamchaser/depository_manage/entity/SplitInventory.java b/src/main/java/com/dreamchaser/depository_manage/entity/SplitInventory.java
new file mode 100644
index 00000000..44c1e795
--- /dev/null
+++ b/src/main/java/com/dreamchaser/depository_manage/entity/SplitInventory.java
@@ -0,0 +1,34 @@
+package com.dreamchaser.depository_manage.entity;
+
+import lombok.Data;
+
+/**
+ * 拆单后出入库记录
+ */
+@Data
+public class SplitInventory {
+    /**
+     * 记录id
+     */
+    private Integer id;
+    /**
+     * 对应库存id
+     */
+    private Integer iid;
+    /**
+     * 对应拆单id
+     */
+    private Integer sid;
+    /**
+     * 出库数量
+     */
+    private Integer outQuantity;
+    /**
+     * 入库数量
+     */
+    private Integer inQuantity;
+    /**
+     * 入库后剩余的数量
+     */
+    private Integer saveQuantity;
+}
diff --git a/src/main/java/com/dreamchaser/depository_manage/mapper/SplitUnitMapper.java b/src/main/java/com/dreamchaser/depository_manage/mapper/SplitUnitMapper.java
new file mode 100644
index 00000000..55498fc3
--- /dev/null
+++ b/src/main/java/com/dreamchaser/depository_manage/mapper/SplitUnitMapper.java
@@ -0,0 +1,98 @@
+package com.dreamchaser.depository_manage.mapper;
+
+import com.dreamchaser.depository_manage.entity.SplitInfo;
+import com.dreamchaser.depository_manage.entity.SplitInventory;
+import org.apache.ibatis.annotations.Mapper;
+import org.springframework.stereotype.Repository;
+
+import java.util.List;
+import java.util.Map;
+
+@Mapper
+@Repository
+public interface SplitUnitMapper {
+    /**
+     * 用于添加一条拆单记录
+     * @param map 待添加数据
+     * @return
+     */
+    Integer addSplitInfo(Map<String,Object> map);
+
+    /**
+     * 用于修改拆单记录数据
+     * @param map 待修改数据
+     * @return
+     */
+    Integer updateSplitInfo(Map<String,Object> map);
+
+    /**
+     * 用于修改拆单记录数据
+     * @param splitInfo 待修改数据
+     * @return
+     */
+    Integer updateSplitInfo(SplitInfo splitInfo);
+
+    /**
+     * 通过主键id删除一条拆单记录
+     * @param id 待删除主键id
+     * @return
+     */
+    Integer delSplitInfoById(Integer id);
+
+    /**
+     * 通过主键id批量删除一条拆单记录
+     * @param ids 待删除主键id
+     * @return
+     */
+    Integer delSplitInfoByIds(List<Integer> ids);
+
+    /**
+     * 用于添加一条拆单库存处理记录
+     * @param map 待添加数量
+     * @return
+     */
+    Integer addSplitInventory(Map<String,Object> map);
+
+    /**
+     * 用于修改拆单库存处理记录
+     * @param map 待修改数据
+     * @return
+     */
+    Integer updateSplitInventory(Map<String,Object> map);
+
+    /**
+     * 用于修改拆单库存处理记录
+     * @param splitInventory 待修改数据
+     * @return
+     */
+    Integer updateSplitInventory(SplitInventory splitInventory);
+
+    /**
+     * 通过主键id删除一条拆单库存处理记录
+     * @param id 待删除主键id
+     * @return
+     */
+    Integer delSplitInventoryById(Integer id);
+
+    /**
+     * 通过主键id批量删除一条拆单库存处理记录
+     * @param ids 待删除主键id
+     * @return
+     */
+    Integer delSplitInventoryByIds(List<Integer> ids);
+
+    /**
+     * 通过物料id与拆单前的计量单位获取对应拆单记录
+     * @param map 查询条件
+     * @return
+     */
+    SplitInfo findSplitInfoByMidAndUnit(Map<String,Object> map);
+
+    /**
+     * 通过物料库存id与拆单id获取拆单库存操作记录
+     * @param map 查询条件
+     * @return
+     */
+    SplitInventory findSplitInventoryByIidAndSid(Map<String,Object> map);
+
+}
diff --git a/src/main/java/com/dreamchaser/depository_manage/mapper/SplitUnitMapper.xml b/src/main/java/com/dreamchaser/depository_manage/mapper/SplitUnitMapper.xml
new file mode 100644
index 00000000..444928d6
--- /dev/null
+++ b/src/main/java/com/dreamchaser/depository_manage/mapper/SplitUnitMapper.xml
@@ -0,0 +1,170 @@
+<?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">
+
+<!-- user -->
+<mapper namespace="com.dreamchaser.depository_manage.mapper.SplitUnitMapper">
+    <!-- 字段映射（权限） -->
+
+<!--    权限映射-->
+    <resultMap id="splitInfoMap" type="com.dreamchaser.depository_manage.entity.SplitInfo">
+        <id column="id" property="id" jdbcType="INTEGER" />
+        <result column="mid" property="mid" jdbcType="INTEGER" />
+        <result column="quantity" property="quantity" jdbcType="INTEGER" />
+        <result column="parentId" property="parentId" jdbcType="INTEGER" />
+        <result column="state" property="state" jdbcType="INTEGER" />
+        <result column="oldUnit" property="oldUnit" jdbcType="VARCHAR" />
+        <result column="newUnit" property="newUnit" jdbcType="VARCHAR" />
+    </resultMap>
+
+    <resultMap id="splitInventoryMap" type="com.dreamchaser.depository_manage.entity.SplitInventory">
+        <id column="id" property="id" jdbcType="INTEGER" />
+        <result column="iid" property="iid" jdbcType="INTEGER"/>
+        <result column="sid" property="sid" jdbcType="INTEGER"/>
+        <result column="outQuantity" property="outQuantity" jdbcType="INTEGER"/>
+        <result column="inQuantity" property="inQuantity" jdbcType="INTEGER"/>
+        <result column="saveQuantity" property="saveQuantity" jdbcType="INTEGER"/>
+    </resultMap>
+
+    <sql id="splitInfoAllColumns">
+        s.id,s.mid,s.oldUnit,s.newUnit,s.quantity,s.parentId,s.state
+    </sql>
+
+    <sql id="splitInventoryAllColumns">
+        si.id,si.iid,si.sid.si.outQuantity,si.inQuantity,si.saveQuantity
+    </sql>
+
+    <select id="findSplitInfoByMidAndUnit" parameterType="map" resultMap="splitInfoMap">
+        select
+        <include refid="splitInfoAllColumns"/>
+        from `split` s
+        where 1 = 1
+        <if test="mid != null and mid != ''">
+            and s.mid = #{mid}
+        </if>
+        <if test="oldUnit != null and oldUnit != ''">
+            and s.oldUnit = #{oldUnit}
+        </if>
+        <if test="newUnit != null and newUnit != ''">
+            and s.newUnit = #{newUnit}
+        </if>
+    </select>
+
+
+    <select id="findSplitInventoryByIidAndSid" parameterType="map" resultMap="splitInventoryMap">
+        select
+        <include refid="splitInventoryAllColumns"/>
+        from `split_inventory` si
+        where  1 = 1
+        <if test="iid != null and iid != ''">
+            and si.iid = #{iid},
+        </if>
+        <if test="sid != null and sid != ''">
+            and si.sid = #{sid}
+        </if>
+    </select>
+
+
+    <update id="updateSplitInfo">
+        update `split`
+        <set>
+            <if test="mid != null and mid != ''">
+                mid = #{mid},
+            </if>
+            <if test="oldUnit != null and oldUnit != ''">
+                oldUnit = #{oldUnit},
+            </if>
+            <if test="newUnit != null and newUnit != ''">
+                newUnit = #{newUnit},
+            </if>
+            <if test="quantity != null and quantity != ''">
+                quantity = #{quantity},
+            </if>
+            <if test="parentId != null and parentId != ''">
+                parentId = #{parentId},
+            </if>
+            <if test="state != null and state != ''">
+                state = #{state}
+            </if>
+        </set>
+        where id = #{id}
+    </update>
+
+    <update id="updateSplitInventory">
+        update `split_inventory`
+        <set>
+            <if test="iid != null and iid != ''">
+                iid = #{iid},
+            </if>
+            <if test="sid != null and sid != ''">
+                sid = #{sid},
+            </if>
+            <if test="outQuantity != null and outQuantity != ''">
+                outQuantity = #{outQuantity},
+            </if>
+            <if test="inQuantity != null and inQuantity != ''">
+                inQuantity = #{inQuantity},
+            </if>
+            <if test="saveQuantity != null and saveQuantity != ''">
+                saveQuantity = #{saveQuantity},
+            </if>
+        </set>
+        where id = #{id}
+    </update>
+
+    <insert id="addSplitInfo" parameterType="map" useGeneratedKeys="true" keyProperty="id">
+         INSERT INTO `split` (
+            id, mid, oldUnit,newUnit,quantity,parentId,state
+        ) VALUES (
+            #{id},
+            #{mid},
+            #{oldUnit},
+            #{newUnit},
+            #{quantity},
+            #{parentId},
+            #{state}
+        )
+    </insert>
+
+    <insert id="addSplitInventory" parameterType="map" useGeneratedKeys="true" keyProperty="id">
+         INSERT INTO `split_inventory` (
+            id, iid, sid,outQuantity,inQuantity,saveQuantity
+        ) VALUES (
+            #{id},
+            #{iid},
+            #{sid},
+            #{outQuantity},
+            #{inQuantity},
+            #{saveQuantity}
+        )
+    </insert>
+
+    <delete id="delSplitInfoById" parameterType="int">
+        delete  from `split`  WHERE id = #{id}
+    </delete>
+
+    <delete id="delSplitInfoByIds" parameterType="int">
+        delete from `split`
+        where id in
+        <foreach collection="list" index="index" item="id" open="(" separator="," close=")">
+            #{id}
+        </foreach>
+    </delete>
+
+    <delete id="delSplitInventoryById" parameterType="int">
+        delete  from `split_inventory`  WHERE id = #{id}
+    </delete>
+
+    <delete id="delSplitInventoryByIds" parameterType="int">
+        delete from `split_inventory`
+        where id in
+        <foreach collection="list" index="index" item="id" open="(" separator="," close=")">
+            #{id}
+        </foreach>
+    </delete>
+
+
+
+
+
+
+</mapper>
diff --git a/src/main/java/com/dreamchaser/depository_manage/service/SplitUnitService.java b/src/main/java/com/dreamchaser/depository_manage/service/SplitUnitService.java
new file mode 100644
index 00000000..56c704b1
--- /dev/null
+++ b/src/main/java/com/dreamchaser/depository_manage/service/SplitUnitService.java
@@ -0,0 +1,27 @@
+package com.dreamchaser.depository_manage.service;
+
+import com.dreamchaser.depository_manage.entity.SplitInfo;
+import com.dreamchaser.depository_manage.entity.SplitInventory;
+
+import java.util.List;
+import java.util.Map;
+
+/**
+ * 用于进行拆单操作的service
+ */
+public interface SplitUnitService {
+
+    /**
+     * 用于添加一条拆单记录
+     * @param map 待添加数据
+     * @return
+     */
+    Integer addSplitInfo(Map<String,Object> map);
+
+    /**
+     * 用于添加一条拆单库存处理记录
+     * @param map 待添加数据
+     * @return
+     */
+    Integer addSplitInventory(Map<String,Object> map);
+}
diff --git a/src/main/java/com/dreamchaser/depository_manage/service/impl/SplitUnitServiceImpl.java b/src/main/java/com/dreamchaser/depository_manage/service/impl/SplitUnitServiceImpl.java
new file mode 100644
index 00000000..08e1d952
--- /dev/null
+++ b/src/main/java/com/dreamchaser/depository_manage/service/impl/SplitUnitServiceImpl.java
@@ -0,0 +1,136 @@
+package com.dreamchaser.depository_manage.service.impl;
+
+import com.dreamchaser.depository_manage.entity.Inventory;
+import com.dreamchaser.depository_manage.entity.SplitInfo;
+import com.dreamchaser.depository_manage.entity.SplitInventory;
+import com.dreamchaser.depository_manage.mapper.DepositoryMapper;
+import com.dreamchaser.depository_manage.mapper.MaterialMapper;
+import com.dreamchaser.depository_manage.mapper.PlaceMapper;
+import com.dreamchaser.depository_manage.mapper.SplitUnitMapper;
+import com.dreamchaser.depository_manage.service.DepositoryRecordService;
+import com.dreamchaser.depository_manage.service.MaterialService;
+import com.dreamchaser.depository_manage.service.SplitUnitService;
+import com.dreamchaser.depository_manage.utils.ObjectFormatUtil;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.HashMap;
+import java.util.Map;
+
+
+@Service
+public class SplitUnitServiceImpl implements SplitUnitService {
+
+
+    @Autowired
+    SplitUnitMapper splitUnitMapper;
+
+    @Autowired
+    MaterialMapper materialMapper;
+
+    @Autowired
+    PlaceMapper placeMapper;
+
+    @Autowired
+    DepositoryMapper depositoryMapper;
+
+
+    @Autowired
+    DepositoryRecordService depositoryRecordService;
+
+
+    /**
+     * 用于添加一条拆单记录
+     * @param map 待添加数据
+     * @return
+     */
+    @Override
+    public Integer addSplitInfo(Map<String, Object> map) {
+        // 查询该物料拆单前是否存在该计量单位
+        Map<String,Object> paramForUnit = new HashMap<>();
+        // 获取物料id
+        paramForUnit.put("mid",map.get("mid"));
+        // 获取拆单前的计量单位
+        paramForUnit.put("oldUnit",map.get("oldUnit"));
+        // 查询当前要拆单的记录是否已经是拆单过的
+        SplitInfo splitInfoForUnit = splitUnitMapper.findSplitInfoByMidAndUnit(paramForUnit);
+        if(splitInfoForUnit != null){
+            // 如果是拆单过
+            map.put("parentId",splitInfoForUnit.getId());
+        }else{
+            // 如果没有
+            map.put("parentId",null);
+        }
+        // 插入
+        return splitUnitMapper.addSplitInfo(map);
+    }
+
+    /**
+     * 用于添加一条拆单库存处理记录
+     * @param map 待添加数据
+     * @return
+     */
+    @Override
+    @Transactional(rollbackFor = Exception.class)
+    public Integer addSplitInventory(Map<String, Object> map) {
+        Map<String,Object> paramForUnit = new HashMap<>();
+        paramForUnit.put("newUnit",map.get("unit"));
+        paramForUnit.put("mid",map.get("mid"));
+        // 查询当前拆单是否存在
+        SplitInfo splitInfoForUnit = splitUnitMapper.findSplitInfoByMidAndUnit(paramForUnit);
+
+        // 用于存储最终计算结果
+        Integer result = 0;
+        if(splitInfoForUnit != null) {
+            // 获取当前处理的类型
+            String type = (String) map.get("type");
+
+            // 获取当前操作的库存id
+            Integer iid = ObjectFormatUtil.toInteger(map.get("iid"));
+            // 用于存储拆单库存处理操作的数据
+            Map<String,Object> paramForInsertSplitInventory = new HashMap<>();
+            paramForInsertSplitInventory.put("iid",iid);
+            paramForInsertSplitInventory.put("sid",splitInfoForUnit.getId());
+            // 查询当前库存是否有该拆单的处理记录
+            SplitInventory splitInventory = splitUnitMapper.findSplitInventoryByIidAndSid(paramForInsertSplitInventory);
+            // 获取要操作的数量
+            Double quantity = ObjectFormatUtil.toDouble(map.get("quantity"));
+            if ("in".equals(type)) {
+                // 如果是入库操作
+
+                // 计算处理数量(下取整)
+                Integer disposeQuantity = ObjectFormatUtil.toInteger(Math.floor(quantity / splitInfoForUnit.getQuantity()));
+                // 最终存储到拆单处理的数量
+                double saveQuantity = quantity - disposeQuantity;
+                if(splitInventory != null){
+                    // 如果有过记录
+                    // 设置当前计量单位的库存
+                    splitInventory.setSaveQuantity(ObjectFormatUtil.toInteger(saveQuantity) + splitInventory.getSaveQuantity());
+                    // 设置当前计量单位的入库数目
+                    splitInventory.setInQuantity(ObjectFormatUtil.toInteger(splitInventory.getInQuantity() + quantity));
+                    splitUnitMapper.updateSplitInventory(splitInventory);
+                }else{
+                    // 如果没有记录
+
+                    paramForInsertSplitInventory.put("inQuantity",quantity);
+                    paramForInsertSplitInventory.put("saveQuantity",saveQuantity);
+                    splitUnitMapper.addSplitInventory(paramForInsertSplitInventory);
+                }
+
+                map.put("quantity",disposeQuantity);
+
+                result += depositoryRecordService.applicationInPlace(map);
+
+
+            } else if ("out".equals(type)) {
+                // 如果是出库操作
+
+                // 设置出库标志位
+                paramForInsertSplitInventory.put("outFlag",1);
+
+            }
+        }
+        return result;
+    }
+}
diff --git a/src/main/java/com/dreamchaser/depository_manage/utils/ObjectFormatUtil.java b/src/main/java/com/dreamchaser/depository_manage/utils/ObjectFormatUtil.java
index 1555fe13..b3c87cc6 100644
--- a/src/main/java/com/dreamchaser/depository_manage/utils/ObjectFormatUtil.java
+++ b/src/main/java/com/dreamchaser/depository_manage/utils/ObjectFormatUtil.java
@@ -25,4 +25,6 @@ public class ObjectFormatUtil {
         return  (o==null)?null:Boolean.getBoolean(o.toString());
     }
 
+    public static Double toDouble(Object o){return (o == null)?null:Double.parseDouble(o.toString());}
+
 }
diff --git a/src/test/java/com/dreamchaser/depository_manage/TestForOther.java b/src/test/java/com/dreamchaser/depository_manage/TestForOther.java
index 98d3333a..d31cadba 100644
--- a/src/test/java/com/dreamchaser/depository_manage/TestForOther.java
+++ b/src/test/java/com/dreamchaser/depository_manage/TestForOther.java
@@ -23,8 +23,9 @@ public class TestForOther {
 
     @Test
     public void Test() throws IOException {
-
-
+        Double a = 12.5;
+        Integer b = 10;
+        System.out.println(a - b);
     }
 
 }