diff --git a/inventory-backend/app/services/inbound/semi_service.py b/inventory-backend/app/services/inbound/semi_service.py
index 6baee4f..45f84c1 100644
--- a/inventory-backend/app/services/inbound/semi_service.py
+++ b/inventory-backend/app/services/inbound/semi_service.py
@@ -156,8 +156,14 @@ class SemiInboundService:
 
             in_qty = float(data.get('in_quantity') or 0)
             raw_cost = float(data.get('raw_material_cost') or 0)
-            # 【重要修改】：把前端的 unit_total_cost（单件成本）存入原数据库的 manual_cost 字段中
-            unit_cost = float(data.get('unit_total_cost') or raw_cost)
+            bom_code = data.get('bom_code')
+            bom_version = data.get('bom_version')
+            # 根据是否有BOM决定单价
+            if bom_code and bom_version:
+                # 使用BOM成本作为单价
+                unit_cost = SemiInboundService.calculate_bom_cost(bom_code, bom_version)
+            else:
+                unit_cost = raw_cost
             total_value = unit_cost * in_qty
 
             next_global_id = 0
@@ -304,13 +310,23 @@ class SemiInboundService:
 
             if 'raw_material_cost' in data:
                 stock.raw_material_cost = float(data['raw_material_cost'])
-            if 'unit_total_cost' in data:
-                stock.manual_cost = float(data['unit_total_cost'])  # 映射到 manual_cost 物理字段
+
+            # 决定单件成本：有BOM用BOM成本，否则用raw_material_cost
+            bom_code = data.get('bom_code', stock.bom_code)
+            bom_version = data.get('bom_version', stock.bom_version)
+            raw_cost = float(data.get('raw_material_cost', stock.raw_material_cost or 0))
+            if bom_code and bom_version:
+                try:
+                    unit_cost = SemiInboundService.calculate_bom_cost(bom_code, bom_version)
+                except Exception:
+                    unit_cost = raw_cost
+            else:
+                unit_cost = raw_cost
+            stock.manual_cost = unit_cost
 
             if 'unit_total_cost' in data or qty_changed:
                 qty = float(stock.in_quantity or 1)
-                # 使用存入 manual_cost 的单价计算总价
-                stock.total_price = float(stock.manual_cost or 0) * qty
+                stock.total_price = unit_cost * qty
 
             db.session.commit()
             return stock
diff --git a/inventory-web/src/views/stock/inbound/semi.vue b/inventory-web/src/views/stock/inbound/semi.vue
index d756717..4a2ca9c 100644
--- a/inventory-web/src/views/stock/inbound/semi.vue
+++ b/inventory-web/src/views/stock/inbound/semi.vue
@@ -807,11 +807,24 @@ const form = reactive({
 })
 
 // === 监听计算总成本 ===
-watch([() => form.unit_total_cost, () => form.in_quantity], ([unit, qty]) => {
-  const unitNum = Number(unit || 0)
-  const qtyNum = Number(qty || 1)
-  form.total_price = Number((unitNum * qtyNum).toFixed(2))
-})
+const computeTotalPrice = () => {
+  let unitCost = 0
+  if (form.bom_code) {
+    // 如果BOM编号有值，则单价采用基于BOM成本 (unit_total_cost)
+    unitCost = Number(form.unit_total_cost || 0)
+  } else {
+    // 如果BOM编号为空，则单价采用估算成本 (raw_material_cost)
+    unitCost = Number(form.raw_material_cost || 0)
+  }
+  const qty = Number(form.in_quantity || 1)
+  form.total_price = Number((unitCost * qty).toFixed(2))
+}
+
+watch(
+  () => [form.bom_code, form.unit_total_cost, form.raw_material_cost, form.in_quantity],
+  () => computeTotalPrice(),
+  { immediate: true, deep: false }
+)
 
 // ------------------------------------
 // BOM Search Logic