diff --git a/src/api/lb-department-user.js b/src/api/lb-department-user.js
index a0cb5fe..524c425 100644
--- a/src/api/lb-department-user.js
+++ b/src/api/lb-department-user.js
@@ -30,3 +30,11 @@ export function deleteLbDepartmentUser(id) {
     method: 'delete'
   })
 }
+
+export function bindLbDepartmentUserParent(params) {
+  return request({
+    url: '/lbDepartmentUser/bindParentUser',
+    method: 'post',
+    params
+  })
+}
diff --git a/src/views/lb-business/department-user/index.vue b/src/views/lb-business/department-user/index.vue
index 0a3a49d..2cb7db1 100644
--- a/src/views/lb-business/department-user/index.vue
+++ b/src/views/lb-business/department-user/index.vue
@@ -186,7 +186,7 @@
       <div slot="footer" class="dialog-footer">
         <span class="selected-tip">已选 {{ parentSelectedRows.length }} 人</span>
         <el-button @click="parentDialogVisible = false">关闭</el-button>
-        <el-button type="primary" @click="confirmParentSelection">确定</el-button>
+        <el-button type="primary" :loading="parentBindLoading" @click="confirmParentSelection">确定</el-button>
       </div>
     </el-dialog>
   </div>
@@ -195,6 +195,7 @@
 <script>
 import {
   addLbDepartmentUser,
+  bindLbDepartmentUserParent,
   deleteLbDepartmentUser,
   getLbDepartmentUserList,
   updateLbDepartmentUser
@@ -206,6 +207,7 @@ export default {
     return {
       loading: false,
       submitLoading: false,
+      parentBindLoading: false,
       list: [],
       total: 0,
       dialogVisible: false,
@@ -217,6 +219,7 @@ export default {
       parentList: [],
       parentTotal: 0,
       parentSelectedRows: [],
+      lastSelectedParentRow: null,
       queryParams: {
         current: 1,
         size: 10,
@@ -419,7 +422,18 @@ export default {
       return params
     },
     handleParentSelectionChange(selection) {
-      this.parentSelectedRows = selection
+      if (!selection.length) {
+        this.parentSelectedRows = []
+        this.lastSelectedParentRow = null
+        return
+      }
+      const latestSelected = selection[selection.length - 1]
+      if (selection.length > 1 && this.$refs.parentTable) {
+        this.$refs.parentTable.clearSelection()
+        this.$refs.parentTable.toggleRowSelection(latestSelected, true)
+      }
+      this.parentSelectedRows = [latestSelected]
+      this.lastSelectedParentRow = latestSelected
     },
     handleParentQuery() {
       this.parentQueryParams.current = 1
@@ -451,13 +465,45 @@ export default {
         this.$message.warning('请先勾选上级人员')
         return
       }
-      this.$message.success(`已勾选 ${this.parentSelectedRows.length} 位人员`)
-      this.parentDialogVisible = false
+      if (this.parentSelectedRows.length > 1) {
+        this.$message.warning('一次只能选择 1 位上级人员')
+        return
+      }
+      if (!this.currentParentTarget || !this.currentParentTarget.userId) {
+        this.$message.error('未获取到当前子用户信息，请重新打开弹框后重试')
+        return
+      }
+      const selectedParent = this.parentSelectedRows[0]
+      if (!selectedParent || !selectedParent.userId) {
+        this.$message.error('未获取到上级用户ID，请重新选择')
+        return
+      }
+      const tenantId = this.currentParentTarget.tenantId || selectedParent.tenantId || ''
+      if (!tenantId) {
+        this.$message.error('未获取到租户ID，无法绑定')
+        return
+      }
+      this.parentBindLoading = true
+      bindLbDepartmentUserParent({
+        parentUserId: selectedParent.userId,
+        parentUserName: selectedParent.name || undefined,
+        childUserId: this.currentParentTarget.userId,
+        childUserName: this.currentParentTarget.name || undefined,
+        tenantId
+      }).then((res) => {
+        this.$message.success((res && res.message) || '绑定上级成功')
+        this.parentDialogVisible = false
+        this.fetchList()
+      }).finally(() => {
+        this.parentBindLoading = false
+      })
     },
     resetParentDialog() {
       this.parentList = []
       this.parentTotal = 0
       this.parentSelectedRows = []
+      this.lastSelectedParentRow = null
+      this.parentBindLoading = false
       this.currentParentTarget = null
       this.parentQueryParams = {
         current: 1,