diff --git a/inventory-backend/app/services/inbound/buy_service.py b/inventory-backend/app/services/inbound/buy_service.py
index 1b00f37..f095f36 100644
--- a/inventory-backend/app/services/inbound/buy_service.py
+++ b/inventory-backend/app/services/inbound/buy_service.py
@@ -101,10 +101,10 @@ class BuyInboundService:
             if not material.is_enabled: raise ValueError(f"物料【{material.name}】已停用")
 
             # ============================================================
-            # 物料类别隔离校验：采购入库必须为"原材料"类目（白名单准入制）
+            # 物料类别隔离校验：采购入库禁止【半成品】和【成品】（黑名单拦截制）
             # ============================================================
-            if not material.category or "原材料" not in material.category:
-                raise ValueError(f"物料【{material.name}】属于【{material.category or '未分类'}】，只有【原材料】才允许采购入库！")
+            if material.category and ('/半成品' in material.category or '/成品' in material.category):
+                raise ValueError(f"物料【{material.name}】属于【{material.category}】，【半成品】和【成品】不允许直接采购入库！")
 
             # ============================================================
             # 强制质检校验：如果物料标记为强制质检，则必须提供到检状态和检测报告
diff --git a/inventory-backend/app/services/inbound/product_service.py b/inventory-backend/app/services/inbound/product_service.py
index a1f4a21..7c55c45 100644
--- a/inventory-backend/app/services/inbound/product_service.py
+++ b/inventory-backend/app/services/inbound/product_service.py
@@ -116,10 +116,10 @@ class ProductInboundService:
                 raise ValueError(f"物料【{material.name}】已停用，无法办理新入库。")
 
             # ============================================================
-            # 物料类别隔离校验：成品入库必须为"成品"类目（白名单准入制）
+            # 物料类别隔离校验：成品入库必须为【成品】类目（精确白名单准入制）
             # ============================================================
-            if not material.category or "成品" not in material.category:
-                raise ValueError(f"物料【{material.name}】属于【{material.category or '未分类'}】，只有【成品】才允许成品入库！")
+            if not material.category or '/成品' not in material.category:
+                raise ValueError(f"物料【{material.name}】属于【{material.category or '未分类'}】，只有【成品】才允许进行成品入库！")
 
             ProductInboundService._check_unique(
                 serial_number=data.get('serial_number')
diff --git a/inventory-backend/app/services/inbound/semi_service.py b/inventory-backend/app/services/inbound/semi_service.py
index 290e65b..0c7ccd1 100644
--- a/inventory-backend/app/services/inbound/semi_service.py
+++ b/inventory-backend/app/services/inbound/semi_service.py
@@ -123,10 +123,10 @@ class SemiInboundService:
                 raise ValueError(f"物料【{material.name}】已停用，无法办理新入库。")
 
             # ============================================================
-            # 物料类别隔离校验：半成品入库必须为"半成品"类目（白名单准入制）
+            # 物料类别隔离校验：半成品入库必须为【半成品】类目（精确白名单准入制）
             # ============================================================
-            if not material.category or "半成品" not in material.category:
-                raise ValueError(f"物料【{material.name}】属于【{material.category or '未分类'}】，只有【半成品】才允许半成品入库！")
+            if not material.category or '/半成品' not in material.category:
+                raise ValueError(f"物料【{material.name}】属于【{material.category or '未分类'}】，只有【半成品】才允许进行半成品入库！")
 
             SemiInboundService._check_unique(
                 base_id=base_id,