diff --git a/inventory-backend/app/api/v1/warehouse.py b/inventory-backend/app/api/v1/warehouse.py
new file mode 100644
index 0000000..8e24d09
--- /dev/null
+++ b/inventory-backend/app/api/v1/warehouse.py
@@ -0,0 +1,180 @@
+# inventory-backend/app/api/v1/warehouse.py
+from flask import Blueprint, request, jsonify
+from app.extensions import db
+from app.models.system import SysWarehouseLocation
+
+warehouse_bp = Blueprint('warehouse', __name__, url_prefix='/api/v1/warehouse')
+
+
+def build_tree(nodes, parent_id=None):
+    """
+    将平铺的数据构建为树形结构
+    """
+    tree = []
+    for node in nodes:
+        if node.parent_id == parent_id:
+            children = build_tree(nodes, node.id)
+            node_dict = node.to_dict()
+            if children:
+                node_dict['children'] = children
+            else:
+                node_dict['children'] = []
+            tree.append(node_dict)
+    return tree
+
+
+@warehouse_bp.route('/tree', methods=['GET'])
+def get_tree():
+    """
+    获取库位树形结构
+    """
+    try:
+        # 查询所有库位
+        all_locations = SysWarehouseLocation.query.order_by(SysWarehouseLocation.level, SysWarehouseLocation.id).all()
+        
+        # 构建树形结构
+        tree_data = build_tree(all_locations, parent_id=None)
+        
+        return jsonify({
+            'code': 200,
+            'msg': 'success',
+            'data': tree_data
+        })
+    except Exception as e:
+        return jsonify({
+            'code': 500,
+            'msg': str(e),
+            'data': None
+        }), 500
+
+
+@warehouse_bp.route('', methods=['POST'])
+def create_location():
+    """
+    创建库位
+    """
+    try:
+        data = request.get_json()
+        name = data.get('name', '').strip()
+        parent_id = data.get('parent_id')  # None 表示顶级
+        is_enabled = data.get('is_enabled', True)
+        
+        if not name:
+            return jsonify({'code': 400, 'msg': '库位名称不能为空', 'data': None})
+        
+        # 计算 level 和 full_path
+        if parent_id is None:
+            level = 0
+            full_path = name
+            parent_full_path = ''
+        else:
+            parent = SysWarehouseLocation.query.get(parent_id)
+            if not parent:
+                return jsonify({'code': 400, 'msg': '父级库位不存在', 'data': None})
+            level = parent.level + 1
+            parent_full_path = parent.full_path or ''
+            full_path = f"{parent_full_path}/{name}" if parent_full_path else name
+        
+        location = SysWarehouseLocation(
+            name=name,
+            parent_id=parent_id,
+            full_path=full_path,
+            level=level,
+            is_enabled=is_enabled
+        )
+        db.session.add(location)
+        db.session.commit()
+        
+        return jsonify({
+            'code': 200,
+            'msg': '创建成功',
+            'data': location.to_dict()
+        })
+    except Exception as e:
+        db.session.rollback()
+        return jsonify({
+            'code': 500,
+            'msg': str(e),
+            'data': None
+        }), 500
+
+
+@warehouse_bp.route('/<int:location_id>', methods=['PUT'])
+def update_location(location_id):
+    """
+    更新库位
+    """
+    try:
+        data = request.get_json()
+        location = SysWarehouseLocation.query.get(location_id)
+        
+        if not location:
+            return jsonify({'code': 404, 'msg': '库位不存在', 'data': None})
+        
+        # 更新名称
+        if 'name' in data and data['name']:
+            new_name = data['name'].strip()
+            if new_name != location.name:
+                # 需要更新 full_path
+                parent = location.parent
+                if parent:
+                    location.full_path = f"{parent.full_path}/{new_name}" if parent.full_path else new_name
+                else:
+                    location.full_path = new_name
+                location.name = new_name
+        
+        # 更新启用状态
+        if 'is_enabled' in data:
+            location.is_enabled = data['is_enabled']
+        
+        db.session.commit()
+        
+        return jsonify({
+            'code': 200,
+            'msg': '更新成功',
+            'data': location.to_dict()
+        })
+    except Exception as e:
+        db.session.rollback()
+        return jsonify({
+            'code': 500,
+            'msg': str(e),
+            'data': None
+        }), 500
+
+
+@warehouse_bp.route('/<int:location_id>', methods=['DELETE'])
+def delete_location(location_id):
+    """
+    删除库位（级联删除子库位）
+    """
+    try:
+        location = SysWarehouseLocation.query.get(location_id)
+        
+        if not location:
+            return jsonify({'code': 404, 'msg': '库位不存在', 'data': None})
+        
+        # 递归删除所有子库位
+        def delete_recursive(loc):
+            # 先删除所有子节点
+            children = SysWarehouseLocation.query.filter_by(parent_id=loc.id).all()
+            for child in children:
+                delete_recursive(child)
+            # 再删除自身
+            db.session.delete(loc)
+        
+        delete_recursive(location)
+        db.session.commit()
+        
+        return jsonify({
+            'code': 200,
+            'msg': '删除成功',
+            'data': None
+        })
+    except Exception as e:
+        db.session.rollback()
+        return jsonify({
+            'code': 500,
+            'msg': str(e),
+            'data': None
+        }), 500
diff --git a/inventory-backend/app/models/system.py b/inventory-backend/app/models/system.py
index f3ecbb4..3daa395 100644
--- a/inventory-backend/app/models/system.py
+++ b/inventory-backend/app/models/system.py
@@ -168,10 +168,14 @@ class SysWarehouseLocation(db.Model):
     level = db.Column(db.Integer, default=0)  # 层级深度，顶级为0
     is_enabled = db.Column(db.Boolean, default=True)
     created_at = db.Column(db.DateTime, default=datetime.now)
-    updated_at = db.Column(db.DateTime, default=datetime.now, onupdate=datetime.now)
+    # 注意：数据库表中没有 updated_at 字段，不要添加！
 
-    # 自关联
-    children = db.relationship('SysWarehouseLocation', backref=db.backref('parent', remote_side=[id]), lazy='dynamic')
+    # 自关联 - 使用 backref 定义父节点的反向引用
+    children = db.relationship(
+        'SysWarehouseLocation',
+        backref=db.backref('parent', remote_side=[id]),
+        lazy='dynamic'
+    )
 
     def to_dict(self):
         return {
@@ -181,6 +185,5 @@ class SysWarehouseLocation(db.Model):
             'full_path': self.full_path,
             'level': self.level,
             'is_enabled': self.is_enabled,
-            'created_at': self.created_at.isoformat() if self.created_at else None,
-            'updated_at': self.updated_at.isoformat() if self.updated_at else None
+            'created_at': self.created_at.isoformat() if self.created_at else None
         }
\ No newline at end of file
diff --git a/inventory-web/src/api/common/warehouse.ts b/inventory-web/src/api/common/warehouse.ts
new file mode 100644
index 0000000..c2554e1
--- /dev/null
+++ b/inventory-web/src/api/common/warehouse.ts
@@ -0,0 +1,35 @@
+import request from '@/utils/request'
+
+// 获取库位树形结构
+export function getWarehouseTree() {
+  return request({
+    url: '/v1/warehouse/tree',
+    method: 'get'
+  })
+}
+
+// 创建库位
+export function createWarehouse(data: any) {
+  return request({
+    url: '/v1/warehouse',
+    method: 'post',
+    data
+  })
+}
+
+// 更新库位
+export function updateWarehouse(data: any) {
+  return request({
+    url: `/v1/warehouse/${data.id}`,
+    method: 'put',
+    data
+  })
+}
+
+// 删除库位
+export function deleteWarehouse(id: number) {
+  return request({
+    url: `/v1/warehouse/${id}`,
+    method: 'delete'
+  })
+}
diff --git a/inventory-web/src/views/dashboard/index.vue b/inventory-web/src/views/dashboard/index.vue
index ef2c4d0..76f908e 100644
--- a/inventory-web/src/views/dashboard/index.vue
+++ b/inventory-web/src/views/dashboard/index.vue
@@ -84,13 +84,31 @@
               <div class="tree-node">
                 <span class="node-label">{{ node.label }}</span>
                 <span class="node-actions">
-                  <el-button type="primary" link size="small" @click="handleAddChild(data)" :icon="Plus">
+                  <el-button
+                    :type="getLevelButtonType(node.level, 'add')"
+                    link
+                    size="small"
+                    @click="handleAddChild(data)"
+                    :icon="Plus"
+                  >
                     新增下级
                   </el-button>
-                  <el-button type="warning" link size="small" @click="handleEdit(data)" :icon="Edit">
+                  <el-button
+                    :type="getLevelButtonType(node.level, 'edit')"
+                    link
+                    size="small"
+                    @click="handleEdit(data)"
+                    :icon="Edit"
+                  >
                     编辑
                   </el-button>
-                  <el-button type="danger" link size="small" @click="handleDelete(data)" :icon="Delete">
+                  <el-button
+                    :type="getLevelButtonType(node.level, 'delete')"
+                    link
+                    size="small"
+                    @click="handleDelete(data)"
+                    :icon="Delete"
+                  >
                     删除
                   </el-button>
                 </span>
@@ -195,6 +213,21 @@ const savePrinterConfig = async () => {
 }
 
 // ==================== 库位管理相关 ====================
+// 根据层级返回按钮颜色类型
+const getLevelButtonType = (level: number, action: string) => {
+  // 层级颜色映射
+  const levelColors: Record<number, Record<string, string>> = {
+    0: { add: 'primary', edit: 'info', delete: 'danger' },      // 顶级: 蓝/灰/红
+    1: { add: 'success', edit: 'warning', delete: 'danger' },   // 二级: 绿/橙/红
+    2: { add: 'warning', edit: 'info', delete: 'danger' },      // 三级: 橙/灰/红
+  }
+  // 4级及以上统一使用危险色
+  if (level >= 3) {
+    return 'danger'
+  }
+  return levelColors[level]?.[action] || 'primary'
+}
+
 const warehouseDialogVisible = ref(false)
 const treeRef = ref()
 const treeData = ref<any[]>([])
diff --git a/inventory-web/src/views/stock/inbound/buy.vue b/inventory-web/src/views/stock/inbound/buy.vue
index 06b1f6f..e0af247 100644
--- a/inventory-web/src/views/stock/inbound/buy.vue
+++ b/inventory-web/src/views/stock/inbound/buy.vue
@@ -327,16 +327,15 @@
                 </el-col>
                 <el-col :span="6">
                   <el-form-item label="库位" prop="warehouse_location">
-                    <el-autocomplete
-                        v-model="form.warehouse_location"
-                        :fetch-suggestions="querySearchLocation"
-                        placeholder="例如: A-01-02"
-                        style="width: 100%"
-                        clearable
-                        :trigger-on-focus="true"
-                    >
-                      <template #default="{ item }"><div style="font-weight: 500">{{ item.value }}</div></template>
-                    </el-autocomplete>
+                    <el-cascader
+                      v-model="form.warehouse_location"
+                      :options="warehouseOptions"
+                      :props="{ value: 'full_path', label: 'name', children: 'children', checkStrictly: true, emitPath: false }"
+                      placeholder="请选择库位"
+                      style="width: 100%"
+                      clearable
+                      filterable
+                    />
                   </el-form-item>
                 </el-col>
               </el-row>
@@ -653,6 +652,7 @@ import {
   getFilterOptions
 } from '@/api/inbound/buy'
 import {getLabelPreview, executePrint} from '@/api/common/print'
+import { getWarehouseTree } from '@/api/common/warehouse'
 import WebRtcCamera from '@/components/Camera/WebRtcCamera.vue'
 import { useUserStore } from '@/stores/user'
 
@@ -782,6 +782,9 @@ const cameraRef = ref<InstanceType<typeof WebRtcCamera> | null>(null)
 const currentCameraField = ref<'arrival_photo' | 'inspection_report'>('arrival_photo')
 const inspection_report_url = ref('')
 
+// 库位级联选择器数据
+const warehouseOptions = ref<any[]>([])
+
 const advancedFilterVisible = ref(false)
 const advancedConditions = ref([{ field: '', operator: '', value: '' }])
 const fieldOptions = computed(() => {
@@ -1227,6 +1230,18 @@ const fetchOptions = async () => {
   }
 }
 
+// 加载库位树数据
+const loadWarehouseTree = async () => {
+  try {
+    const res = await getWarehouseTree()
+    if (res.code === 200) {
+      warehouseOptions.value = res.data || []
+    }
+  } catch (e) {
+    console.error('加载库位树失败', e)
+  }
+}
+
 const resetQuery = () => {
   queryParams.keyword = ''
   queryParams.category = ''
@@ -1524,6 +1539,7 @@ onMounted(() => {
   initColumnPermissions()
   fetchData()
   fetchOptions()
+  loadWarehouseTree()
 })
 </script>
 
diff --git a/inventory-web/src/views/stock/inbound/product.vue b/inventory-web/src/views/stock/inbound/product.vue
index ab16788..f05834c 100644
--- a/inventory-web/src/views/stock/inbound/product.vue
+++ b/inventory-web/src/views/stock/inbound/product.vue
@@ -286,7 +286,17 @@
             <div class="card-content">
               <el-row :gutter="24">
                 <el-col :span="6"><el-form-item label="SKU" prop="sku"><el-input v-model="form.sku" placeholder="自动生成" disabled /></el-form-item></el-col>
-                <el-col :span="6"><el-form-item label="库位" prop="warehouse_location"><el-input v-model="form.warehouse_location" placeholder="例如: B-01-01" clearable /></el-form-item></el-col>
+                <el-col :span="6"><el-form-item label="库位" prop="warehouse_location">
+                  <el-cascader
+                    v-model="form.warehouse_location"
+                    :options="warehouseOptions"
+                    :props="{ value: 'full_path', label: 'name', children: 'children', checkStrictly: true, emitPath: false }"
+                    placeholder="请选择库位"
+                    style="width: 100%"
+                    clearable
+                    filterable
+                  />
+                </el-form-item></el-col>
                 <el-col :span="6"><el-form-item label="入库日期"><el-date-picker v-model="form.in_date" type="date" value-format="YYYY-MM-DD" style="width:100%" disabled /></el-form-item></el-col>
               </el-row>
 
@@ -513,6 +523,7 @@ import {
 import { uploadFile, deleteFile } from '@/api/inbound/buy'
 import WebRtcCamera from '@/components/Camera/WebRtcCamera.vue'
 import { getLabelPreview, executePrint } from '@/api/common/print'
+import { getWarehouseTree } from '@/api/common/warehouse'
 import { useUserStore } from '@/stores/user'
 
 // ------------------------------------
@@ -628,6 +639,9 @@ const currentCameraField = ref<'product_photo' | 'quality_report_link' | 'inspec
 const quality_url = ref('')
 const inspection_url = ref('')
 
+// 库位级联选择器数据
+const warehouseOptions = ref<any[]>([])
+
 // [核心优化] 所有列定义
 const allColumns = [
   { prop: 'company_name', label: '所属公司', minWidth: '100', sortable: true }, // [新增]
@@ -958,6 +972,18 @@ const fetchOptions = async () => {
   }
 }
 
+// 加载库位树数据
+const loadWarehouseTree = async () => {
+  try {
+    const res = await getWarehouseTree()
+    if (res.code === 200) {
+      warehouseOptions.value = res.data || []
+    }
+  } catch (e) {
+    console.error('加载库位树失败', e)
+  }
+}
+
 const resetQuery = () => {
   queryParams.keyword = ''
   queryParams.category = ''
@@ -1178,6 +1204,7 @@ onMounted(() => {
   initColumnPermissions()
   fetchData()
   fetchOptions()
+  loadWarehouseTree()
 })
 
 // 成本计算监听
diff --git a/inventory-web/src/views/stock/inbound/semi.vue b/inventory-web/src/views/stock/inbound/semi.vue
index 23275e2..762648f 100644
--- a/inventory-web/src/views/stock/inbound/semi.vue
+++ b/inventory-web/src/views/stock/inbound/semi.vue
@@ -345,7 +345,17 @@
               <el-row :gutter="24">
                 <el-col :span="6"><el-form-item label="编码/SKU" prop="sku"><el-input v-model="form.sku" placeholder="系统自动生成" disabled/></el-form-item></el-col>
                 <el-col :span="6"><el-form-item label="入库日期" prop="in_date"><el-date-picker v-model="form.in_date" type="date" value-format="YYYY-MM-DD" style="width:100%" disabled/></el-form-item></el-col>
-                <el-col :span="6"><el-form-item label="库位" prop="warehouse_location"><el-input v-model="form.warehouse_location" placeholder="例如: B-01-01" clearable/></el-form-item></el-col>
+                <el-col :span="6"><el-form-item label="库位" prop="warehouse_location">
+                  <el-cascader
+                    v-model="form.warehouse_location"
+                    :options="warehouseOptions"
+                    :props="{ value: 'full_path', label: 'name', children: 'children', checkStrictly: true, emitPath: false }"
+                    placeholder="请选择库位"
+                    style="width: 100%"
+                    clearable
+                    filterable
+                  />
+                </el-form-item></el-col>
               </el-row>
 
               <div class="identity-panel">
@@ -577,6 +587,7 @@ import {
 import { uploadFile, deleteFile } from '@/api/inbound/buy'
 import WebRtcCamera from '@/components/Camera/WebRtcCamera.vue'
 import {getLabelPreview, executePrint} from '@/api/common/print'
+import { getWarehouseTree } from '@/api/common/warehouse'
 import { useUserStore } from '@/stores/user'
 
 // ------------------------------------
@@ -691,6 +702,9 @@ const cameraRef = ref<InstanceType<typeof WebRtcCamera> | null>(null)
 const currentCameraField = ref<'arrival_photo' | 'quality_report_link'>('arrival_photo')
 const quality_report_url = ref('')
 
+// 库位级联选择器数据
+const warehouseOptions = ref<any[]>([])
+
 const entryMode = ref('batch')
 const modeLocked = ref(false)
 
@@ -1092,6 +1106,18 @@ const fetchOptions = async () => {
   }
 }
 
+// 加载库位树数据
+const loadWarehouseTree = async () => {
+  try {
+    const res = await getWarehouseTree()
+    if (res.code === 200) {
+      warehouseOptions.value = res.data || []
+    }
+  } catch (e) {
+    console.error('加载库位树失败', e)
+  }
+}
+
 const resetQuery = () => {
   queryParams.keyword = ''
   queryParams.category = ''
@@ -1306,6 +1332,7 @@ onMounted(() => {
   initColumnPermissions()
   fetchData()
   fetchOptions()
+  loadWarehouseTree()
 })
 </script>