diff --git a/inventory-backend/app/services/permission_service.py b/inventory-backend/app/services/permission_service.py
index 4ddaf65..9024154 100644
--- a/inventory-backend/app/services/permission_service.py
+++ b/inventory-backend/app/services/permission_service.py
@@ -160,16 +160,21 @@ class PermissionService:
                 unique_codes = set(permissions)
                 all_menu_codes = {res[0] for res in session.query(SysMenu.code).all()}
 
+                # 全局权限码 — 不按公司隔离，始终写入 company_name=''
+                GLOBAL_CODES = {'crossDomain', 'global:cross_company_op'}
+
                 new_records = []
                 for code in unique_codes:
                     if not code: continue
                     p_type = 'menu' if code in all_menu_codes else 'element'
+                    # 全局权限码强制 company_name=''，确保跨公司生效
+                    target_company = '' if code in GLOBAL_CODES else company_name
 
                     new_records.append(SysRolePermission(
                         role_code=role_code,
                         target_code=code,
                         type=p_type,
-                        company_name=company_name  # ★ 存储公司标识
+                        company_name=target_company
                     ))
 
                 if new_records: