diff --git a/bms-back/bms-system/src/main/java/com/bms/customer/customerinfo/mapper/CustomerSyncMapper.java b/bms-back/bms-system/src/main/java/com/bms/customer/customerinfo/mapper/CustomerSyncMapper.java
index 0ce4e6d5..db93569d 100644
--- a/bms-back/bms-system/src/main/java/com/bms/customer/customerinfo/mapper/CustomerSyncMapper.java
+++ b/bms-back/bms-system/src/main/java/com/bms/customer/customerinfo/mapper/CustomerSyncMapper.java
@@ -1,6 +1,7 @@
 package com.bms.customer.customerinfo.mapper;
 
 import java.util.List;
+import com.bms.common.core.domain.entity.SysUser;
 import com.bms.customer.customerinfo.domain.BmsCustomer;
 
 /**
@@ -15,6 +16,11 @@ public interface CustomerSyncMapper
      */
     List<String> selectExistingCodes();
 
+    /**
+     * 未删除用户的 工号(user_name)->用户ID(user_id) 映射，用于 TMS BELONG_SALER 工号转换
+     */
+    List<SysUser> selectUserLoginMap();
+
     /**
      * 新增客户（同步专用，字段集与老系统导入脚本一致）
      */
diff --git a/bms-back/bms-system/src/main/java/com/bms/customer/customerinfo/sync/CustomerSyncService.java b/bms-back/bms-system/src/main/java/com/bms/customer/customerinfo/sync/CustomerSyncService.java
index 206daa6b..7f90ebf3 100644
--- a/bms-back/bms-system/src/main/java/com/bms/customer/customerinfo/sync/CustomerSyncService.java
+++ b/bms-back/bms-system/src/main/java/com/bms/customer/customerinfo/sync/CustomerSyncService.java
@@ -4,6 +4,7 @@ import java.math.BigDecimal;
 import java.math.RoundingMode;
 import java.util.ArrayList;
 import java.util.Date;
+import java.util.HashMap;
 import java.util.HashSet;
 import java.util.LinkedHashMap;
 import java.util.List;
@@ -14,6 +15,7 @@ import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import com.bms.common.utils.StringUtils;
+import com.bms.common.core.domain.entity.SysUser;
 import com.bms.customer.customerinfo.domain.BmsCustomer;
 import com.bms.customer.customerinfo.mapper.CustomerSyncMapper;
 
@@ -84,6 +86,9 @@ public class CustomerSyncService
 
         Set<String> existingCodes = new HashSet<>(customerSyncMapper.selectExistingCodes());
 
+        // 业务员归属转本系统用户ID：数据权限按 user_id 控制，工号后续修改不影响归属
+        Map<String, String> userIdByLogin = loadUserIdByLogin();
+
         List<BmsCustomer> inserts = new ArrayList<>();
         List<BmsCustomer> updates = new ArrayList<>();
         Set<String> seenCodes = new HashSet<>();
@@ -118,7 +123,7 @@ public class CustomerSyncService
                 continue;
             }
 
-            BmsCustomer c = mapRow(row, code, name, warnings);
+            BmsCustomer c = mapRow(row, code, name, userIdByLogin, warnings);
             if (existingCodes.contains(code))
             {
                 c.setUpdateBy(SYNC_MARKER);
@@ -155,7 +160,8 @@ public class CustomerSyncService
     /**
      * 单行映射（逻辑对齐 import_customers.py 的 build_row）
      */
-    private BmsCustomer mapRow(Map<String, Object> row, String code, String name, List<String> warnings)
+    private BmsCustomer mapRow(Map<String, Object> row, String code, String name,
+                               Map<String, String> userIdByLogin, List<String> warnings)
     {
         BmsCustomer c = new BmsCustomer();
         c.setCustomerCode(truncate(code, LEN_CODE, code, "customer_code", warnings));
@@ -163,7 +169,7 @@ public class CustomerSyncService
         c.setDelFlag("0");
 
         c.setCustomerCodeDw(truncate(getStr(row, "CUSTOMER_OUTER_CODE"), LEN_CODE_DW, code, "customer_code_dw", warnings));
-        c.setSalesUserId(truncate(getStr(row, "BELONG_SALER"), LEN_USER_ID, code, "sales_user_id", warnings));
+        c.setSalesUserId(resolveSalesUserId(clean(getStr(row, "BELONG_SALER")), userIdByLogin, code, warnings));
         c.setSalesUser(truncate(getStr(row, "BELONG_SALER_NAME"), LEN_USER, code, "sales_user", warnings));
         c.setSettlementUser(truncate(getStr(row, "SETTLEMENT_MAN"), LEN_USER, code, "settlement_user", warnings));
         c.setServiceUser(truncate(getStr(row, "SERVICE_MAN"), LEN_USER, code, "service_user", warnings));
@@ -225,6 +231,42 @@ public class CustomerSyncService
         return ("1".equals(s) || "1.0".equals(s)) ? "0" : "1";
     }
 
+    /** 加载未删除用户的 工号(user_name)->用户ID(user_id) 映射 */
+    private Map<String, String> loadUserIdByLogin()
+    {
+        Map<String, String> map = new HashMap<>();
+        for (SysUser u : customerSyncMapper.selectUserLoginMap())
+        {
+            if (u != null && u.getUserName() != null && u.getUserId() != null
+                    && !map.containsKey(u.getUserName()))
+            {
+                map.put(u.getUserName(), String.valueOf(u.getUserId()));
+            }
+        }
+        return map;
+    }
+
+    /**
+     * 业务员工号 -> 本系统 sys_user.user_id 转换（数据权限按 user_id 控制，工号修改不影响归属）。
+     * 工号在系统用户中不存在时保留原工号并告警（常见于该用户尚未同步），避免归属信息丢失。
+     */
+    private String resolveSalesUserId(String salerCode, Map<String, String> userIdByLogin,
+                                      String code, List<String> warnings)
+    {
+        String s = truncate(salerCode, LEN_USER_ID, code, "sales_user_id", warnings);
+        if (s == null)
+        {
+            return null;
+        }
+        String userId = userIdByLogin.get(s);
+        if (userId != null)
+        {
+            return userId;
+        }
+        warnings.add(code + ": 业务员工号 " + s + " 在系统用户中不存在，sales_user_id 保留原工号");
+        return s;
+    }
+
     private static String clean(String v)
     {
         if (v == null)
diff --git a/bms-back/bms-system/src/main/resources/mapper/customer/BmsCustomerMapper.xml b/bms-back/bms-system/src/main/resources/mapper/customer/BmsCustomerMapper.xml
index 09fd91a6..ac156764 100644
--- a/bms-back/bms-system/src/main/resources/mapper/customer/BmsCustomerMapper.xml
+++ b/bms-back/bms-system/src/main/resources/mapper/customer/BmsCustomerMapper.xml
@@ -59,12 +59,11 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
                su.nick_name as sales_user_nick_name,
                cps.price_set_id, ps.price_set_name
         from ctr_customer c
-        <!-- 老系统同步数据 sales_user_id 存员工工号（=sys_user.user_name）；
-             BMS 手工新建数据可能存数字 user_id，两种都要能关联上。
-             'WS0052'+0 在 MySQL 中结果为 0，不会误关联到任何用户 -->
+        <!-- sales_user_id 统一存本系统 user_id（同步时由工号转换、手工录入选人即存ID），
+             数据权限按 su.user_id / su.dept_id 控制；保留 user_name 匹配仅作历史未转换工号兜底 -->
         left join sys_user su
             on su.del_flag = '0'
-           and (su.user_name = c.sales_user_id or su.user_id = c.sales_user_id + 0)
+           and (su.user_id = c.sales_user_id + 0 or su.user_name = c.sales_user_id)
         <!-- 客户套餐绑定：uk_customer_one_set 保证一客户至多一条，不会放大行数 -->
         left join prc_customer_price_set cps on cps.customer_id = c.customer_id
         left join prc_price_set ps on ps.price_set_id = cps.price_set_id
diff --git a/bms-back/bms-system/src/main/resources/mapper/customer/CustomerSyncMapper.xml b/bms-back/bms-system/src/main/resources/mapper/customer/CustomerSyncMapper.xml
index b793af55..572aef76 100644
--- a/bms-back/bms-system/src/main/resources/mapper/customer/CustomerSyncMapper.xml
+++ b/bms-back/bms-system/src/main/resources/mapper/customer/CustomerSyncMapper.xml
@@ -8,6 +8,13 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
         SELECT customer_code FROM ctr_customer WHERE del_flag = '0'
     </select>
 
+    <!-- 工号->用户ID 映射（列别名显式映射，项目未开下划线转驼峰） -->
+    <select id="selectUserLoginMap" resultType="com.bms.common.core.domain.entity.SysUser">
+        SELECT user_id AS userId, user_name AS userName
+          FROM sys_user
+         WHERE del_flag = '0'
+    </select>
+
     <!-- 字段集与 scripts/import_customers.py 的 MAP_COLUMNS 保持一致；
          源行为空的字段不写，走数据库默认值 -->
     <insert id="insertSyncCustomer" parameterType="com.bms.customer.customerinfo.domain.BmsCustomer">
diff --git a/bms-back/sql/20261019_customer_sales_user_to_userid.sql b/bms-back/sql/20261019_customer_sales_user_to_userid.sql
new file mode 100644
index 00000000..9fce5381
--- /dev/null
+++ b/bms-back/sql/20261019_customer_sales_user_to_userid.sql
@@ -0,0 +1,10 @@
+-- 客户归属销售员由"工号"改存本系统用户ID（数据权限按 user_id 控制，工号后续修改不影响归属）
+-- 同步链路已在 CustomerSyncService.resolveSalesUserId 做同样转换，本脚本只处理存量数据。
+-- 仅转换"含非数字字符"的工号值（工号形如 WS0052/WSC0184/wsadmin）；
+-- 已是数字(user_id)的行不触碰，脚本可重复执行。
+UPDATE ctr_customer c
+JOIN sys_user u ON u.del_flag = '0' AND u.user_name = c.sales_user_id
+SET c.sales_user_id = CONVERT(u.user_id, CHAR)
+WHERE c.del_flag = '0'
+  AND c.sales_user_id IS NOT NULL
+  AND c.sales_user_id REGEXP '[^0-9]';
diff --git a/bms-front/src/views/customersuppliermanagement/customerinfo/customeredit/index.vue b/bms-front/src/views/customersuppliermanagement/customerinfo/customeredit/index.vue
index a52c7583..252211ff 100644
--- a/bms-front/src/views/customersuppliermanagement/customerinfo/customeredit/index.vue
+++ b/bms-front/src/views/customersuppliermanagement/customerinfo/customeredit/index.vue
@@ -75,7 +75,6 @@
                 <el-form-item label="业务员" prop="salesUserId">
                   <user-select
                     v-model="form.salesUserId"
-                    value-field="userName"
                     placeholder="请选择业务员"
                     @change="(uid, user) => handleUserChange(uid, user, 'salesUser')"
                   />
diff --git a/bms-front/src/views/customersuppliermanagement/customerinfo/index.vue b/bms-front/src/views/customersuppliermanagement/customerinfo/index.vue
index 1c2e95ee..b7a7a166 100644
--- a/bms-front/src/views/customersuppliermanagement/customerinfo/index.vue
+++ b/bms-front/src/views/customersuppliermanagement/customerinfo/index.vue
@@ -34,8 +34,7 @@
       <el-form-item label="业务员" prop="salesUserId">
         <user-select
           v-model="queryParams.salesUserId"
-          value-field="userName"
-          placeholder="工号/姓名搜索"
+          placeholder="姓名/工号搜索"
           @change="handleQuery"
         />
       </el-form-item>