diff --git a/inventory-backend/app/services/inbound/buy_service.py b/inventory-backend/app/services/inbound/buy_service.py
index b4b3654..11fbe5e 100644
--- a/inventory-backend/app/services/inbound/buy_service.py
+++ b/inventory-backend/app/services/inbound/buy_service.py
@@ -100,6 +100,12 @@ class BuyInboundService:
             if not material: raise ValueError("所选物料不存在")
             if not material.is_enabled: raise ValueError(f"物料【{material.name}】已停用")
 
+            # ============================================================
+            # 物料类别隔离校验：采购入库禁止"半成品"/"成品"
+            # ============================================================
+            if material.category and ("半成品" in material.category or "成品" in material.category):
+                raise ValueError(f"物料【{material.name}】类别为【{material.category}】，禁止作为采购件入库！")
+
             # ============================================================
             # 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 ac47faf..a073448 100644
--- a/inventory-backend/app/services/inbound/product_service.py
+++ b/inventory-backend/app/services/inbound/product_service.py
@@ -115,6 +115,12 @@ class ProductInboundService:
             if not material.is_enabled:
                 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
+            # ============================================================
+            if not material.category or "成品" not in material.category:
+                raise ValueError(f"物料【{material.name}】类别为【{material.category or '空'}】，非成品，无法办理成品入库！")
+
             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 1a6dc6b..c4e1b79 100644
--- a/inventory-backend/app/services/inbound/semi_service.py
+++ b/inventory-backend/app/services/inbound/semi_service.py
@@ -122,6 +122,12 @@ class SemiInboundService:
             if not material.is_enabled:
                 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
+            # ============================================================
+            if not material.category or "半成品" not in material.category:
+                raise ValueError(f"物料【{material.name}】类别为【{material.category or '空'}】，非半成品，无法办理半成品入库！")
+
             SemiInboundService._check_unique(
                 base_id=base_id,
                 serial_number=data.get('serial_number'),