diff --git a/inventory-backend/app/services/bom_service.py b/inventory-backend/app/services/bom_service.py
index e6c5e47..940dc19 100644
--- a/inventory-backend/app/services/bom_service.py
+++ b/inventory-backend/app/services/bom_service.py
@@ -404,7 +404,9 @@ class BomService:
             'parent_name': parent_material.name if parent_material else '',
             'parent_spec': parent_material.spec_model if parent_material else '',
             'is_enabled': first.BomTable.is_enabled,
-            'remark': first.BomTable.remark or '',  # ★ 主表备注
+            # ★ BOM 级备注：改取 bom_remark。此前误取 first.BomTable.remark
+            #   （第一个子件行的备注）冒充主表备注，是本次一并修掉的连带 bug
+            'remark': first.BomTable.bom_remark or '',
             'children': children
         }
 
@@ -421,6 +423,8 @@ class BomService:
         parent_id = data['parent_id']
         children = data['children']
         is_enabled = data.get('is_enabled', True)
+        # ★ BOM 级备注：写入本版本每一行（与 is_enabled 等父件级字段同口径）
+        bom_remark = data.get('remark', '') or ''
 
         if not bom_no:
             raise ValueError('BOM编号不能为空')
@@ -527,6 +531,7 @@ class BomService:
                 child_id=child['child_id'],
                 dosage=child.get('dosage', 0),
                 remark=child.get('remark', ''),
+                bom_remark=bom_remark,
                 child_bom_no=child.get('child_bom_no') or None,
                 child_bom_version=child.get('child_bom_version') or None,
                 is_enabled=is_enabled