diff --git a/inventory-backend/app/services/inbound/base_service.py b/inventory-backend/app/services/inbound/base_service.py
index de220e8..2551fc4 100644
--- a/inventory-backend/app/services/inbound/base_service.py
+++ b/inventory-backend/app/services/inbound/base_service.py
@@ -175,47 +175,6 @@ class MaterialBaseService:
             ).outerjoin(buy_sub, MaterialBase.id == buy_sub.c.base_id) \
                 .outerjoin(semi_sub, MaterialBase.id == semi_sub.c.base_id) \
                 .outerjoin(prod_sub, MaterialBase.id == prod_sub.c.base_id)
-            
-            # 关键词精确搜索（需要在子查询层完成）
-            if filters:
-                search_field = filters.get('searchField', 'all')
-                keyword = filters.get('keyword')
-                if keyword:
-                    kw = f"%{keyword}%"
-                    if search_field == 'name':
-                        inner_sub = inner_sub.filter(MaterialBase.name.ilike(kw))
-                    elif search_field == 'common_name':
-                        inner_sub = inner_sub.filter(MaterialBase.common_name.ilike(kw))
-                    elif search_field == 'spec':
-                        inner_sub = inner_sub.filter(MaterialBase.spec_model.ilike(kw))
-                    else:
-                        inner_sub = inner_sub.filter(or_(
-                            MaterialBase.name.ilike(kw),
-                            MaterialBase.common_name.ilike(kw),
-                            MaterialBase.spec_model.ilike(kw)
-                        ))
-
-                company = filters.get('company')
-                if company is not None and company != '':
-                    inner_sub = inner_sub.filter(MaterialBase.company_name.ilike(company.strip()))
-
-                category = filters.get('category')
-                if category is not None and category != '':
-                    inner_sub = inner_sub.filter(MaterialBase.category.ilike(category.strip()))
-
-                type_val = filters.get('type')
-                if type_val is not None and type_val != '':
-                    inner_sub = inner_sub.filter(MaterialBase.material_type.ilike(type_val.strip()))
-
-                if filters.get('isEnabled') is not None:
-                    val_str = str(filters['isEnabled']).lower()
-                    is_active = val_str in ['1', 'true', 'yes', 't']
-                    inner_sub = inner_sub.filter(MaterialBase.is_enabled == is_active)
-
-                # 库存状态筛选 (has_stock) - 使用子查询列
-                has_stock = filters.get('has_stock')
-                if has_stock and str(has_stock).lower() in ['true', '1', 'yes']:
-                    inner_sub = inner_sub.filter(total_inv > 0)
 
             # 将内层子查询具体化
             inner_sub = inner_sub.subquery()
@@ -231,6 +190,47 @@ class MaterialBaseService:
             ).outerjoin(inner_sub, MaterialBase.id == inner_sub.c.base_id) \
                 .outerjoin(MaterialWarningSetting, MaterialBase.id == MaterialWarningSetting.base_id)
 
+            # 【修复】关键词搜索必须在主查询上过滤，不能在 inner_sub 上（因为使用了 Outer Join）
+            if filters:
+                search_field = filters.get('searchField', 'all')
+                keyword = filters.get('keyword')
+                if keyword:
+                    kw = f"%{keyword}%"
+                    if search_field == 'name':
+                        query = query.filter(MaterialBase.name.ilike(kw))
+                    elif search_field == 'common_name':
+                        query = query.filter(MaterialBase.common_name.ilike(kw))
+                    elif search_field == 'spec':
+                        query = query.filter(MaterialBase.spec_model.ilike(kw))
+                    else:
+                        query = query.filter(or_(
+                            MaterialBase.name.ilike(kw),
+                            MaterialBase.common_name.ilike(kw),
+                            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()))
+
+                category = filters.get('category')
+                if category is not None and category != '':
+                    query = query.filter(MaterialBase.category.ilike(category.strip()))
+
+                type_val = filters.get('type')
+                if type_val is not None and type_val != '':
+                    query = query.filter(MaterialBase.material_type.ilike(type_val.strip()))
+
+                if filters.get('isEnabled') is not None:
+                    val_str = str(filters['isEnabled']).lower()
+                    is_active = val_str in ['1', 'true', 'yes', 't']
+                    query = query.filter(MaterialBase.is_enabled == is_active)
+
+                # 库存状态筛选 (has_stock) - 使用子查询列
+                has_stock = filters.get('has_stock')
+                if has_stock and str(has_stock).lower() in ['true', '1', 'yes']:
+                    query = query.filter(inner_sub.c.total_inv > 0)
+
             # ============================================================
             # 【修复3】高级筛选：统一使用 WHERE (filter)
             # 聚合字段同样是子查询列，直接用 filter 过滤即可