diff --git a/inventory-backend/app/services/auth_service.py b/inventory-backend/app/services/auth_service.py
index 70ed46d..07c865b 100644
--- a/inventory-backend/app/services/auth_service.py
+++ b/inventory-backend/app/services/auth_service.py
@@ -104,6 +104,8 @@ class AuthService:
             user_id = user.id
             user_info = user.to_dict()
             user_info['role'] = user_role
+            # 获取用户所属公司（存于 department 字段）
+            user_company = user.department or ''
 
         # 3. 生成 Token
         # Token 中 identity 存数据库ID，claims 存登录账号ID
@@ -115,7 +117,8 @@ class AuthService:
             additional_claims={
                 'role': user_role,
                 'username': account_id,  # 存纯账号ID
-                'display_name': user_info.get('username')  # 存显示名
+                'display_name': user_info.get('username'),  # 存显示名
+                'company_name': user_company  # 存所属公司
             }
         )
 
@@ -125,7 +128,8 @@ class AuthService:
             additional_claims={
                 'role': user_role,
                 'username': account_id,
-                'display_name': user_info.get('display_name', account_id)
+                'display_name': user_info.get('display_name', account_id),
+                'company_name': user_company
             }
         )
 
diff --git a/inventory-backend/app/services/inbound/base_service.py b/inventory-backend/app/services/inbound/base_service.py
index 25bfaa2..f2e96de 100644
--- a/inventory-backend/app/services/inbound/base_service.py
+++ b/inventory-backend/app/services/inbound/base_service.py
@@ -1,5 +1,6 @@
 # 文件路径: app/services/inbound/base_service.py
 
+from flask_jwt_extended import get_jwt
 from app.extensions import db
 from app.models.base import MaterialBase, MaterialWarningSetting
 from app.models.inbound.buy import StockBuy
@@ -209,9 +210,26 @@ class MaterialBaseService:
                             MaterialBase.spec_model.ilike(kw)
                         ))
 
-                company = filters.get('company')
-                if company is not None and company != '':
-                    query = query.filter(MaterialBase.company_name.ilike(company.strip()))
+                # ============================================================
+                # 【行级数据隔离】基于 JWT 中的 company_name 进行过滤
+                # ============================================================
+                claims = get_jwt()
+                user_role = claims.get('role', '').upper() if claims.get('role') else ''
+                user_company = claims.get('company_name', '')
+
+                # 获取前端传的查询参数
+                req_company = filters.get('company') if filters else None
+
+                if user_role != 'SUPER_ADMIN':
+                    # 普通用户：强制隔离！无视前端传的 company 参数
+                    if user_company:
+                        query = query.filter(MaterialBase.company_name == user_company)
+                    # 如果用户没有所属公司字段，则只显示公司为空的记录（或不允许查看）
+                else:
+                    # 超级管理员：允许跨公司视角
+                    if req_company:
+                        query = query.filter(MaterialBase.company_name == req_company)
+                    # 超管没选公司则不加过滤，看到全量
 
                 category = filters.get('category')
                 if category is not None and category != '':
@@ -618,9 +636,23 @@ class MaterialBaseService:
                         MaterialBase.spec_model.ilike(kw),
                         MaterialBase.company_name.ilike(kw)
                     ))
-                company = filters.get('company')
-                if company is not None and company != '':
-                    filter_conditions.append(MaterialBase.company_name.ilike(company.strip()))
+                # ============================================================
+                # 【行级数据隔离】基于 JWT 中的 company_name 进行过滤（高级筛选）
+                # ============================================================
+                claims = get_jwt()
+                user_role = claims.get('role', '').upper() if claims.get('role') else ''
+                user_company = claims.get('company_name', '')
+                req_company = filters.get('company') if filters else None
+
+                if user_role != 'SUPER_ADMIN':
+                    # 普通用户：强制隔离
+                    if user_company:
+                        filter_conditions.append(MaterialBase.company_name == user_company)
+                else:
+                    # 超级管理员：允许跨公司视角
+                    if req_company:
+                        filter_conditions.append(MaterialBase.company_name == req_company)
+
                 category = filters.get('category')
                 if category is not None and category != '':
                     filter_conditions.append(MaterialBase.category.ilike(category.strip()))
diff --git a/inventory-backend/app/services/inbound/buy_service.py b/inventory-backend/app/services/inbound/buy_service.py
index 052db7e..f0808dd 100644
--- a/inventory-backend/app/services/inbound/buy_service.py
+++ b/inventory-backend/app/services/inbound/buy_service.py
@@ -1,4 +1,5 @@
 # inventory-backend/app/services/inbound/buy_service.py
+from flask_jwt_extended import get_jwt
 from app.extensions import db
 from app.models.inbound.buy import StockBuy
 from app.models.inbound.product import StockProduct
@@ -347,9 +348,21 @@ class BuyInboundService:
             if material_type and material_type.strip():
                 query = query.filter(MaterialBase.material_type == material_type.strip())
 
-            # 3.1 公司独立搜索 [新增]
-            if company and company.strip():
-                query = query.filter(MaterialBase.company_name == company.strip())
+            # ============================================================
+            # 【行级数据隔离】基于 JWT 中的 company_name 进行过滤
+            # ============================================================
+            claims = get_jwt()
+            user_role = claims.get('role', '').upper() if claims.get('role') else ''
+            user_company = claims.get('company_name', '')
+
+            if user_role != 'SUPER_ADMIN':
+                # 普通用户：强制隔离！无视前端传的 company 参数
+                if user_company:
+                    query = query.filter(MaterialBase.company_name == user_company)
+            else:
+                # 超级管理员：允许跨公司视角
+                if company and company.strip():
+                    query = query.filter(MaterialBase.company_name == company.strip())
 
             # 4. 状态筛选
             if not statuses: statuses = ['在库', '借库']