diff --git a/inventory-backend/app/api/v1/inbound/stock.py b/inventory-backend/app/api/v1/inbound/stock.py
index 5b683ec..bcd9084 100644
--- a/inventory-backend/app/api/v1/inbound/stock.py
+++ b/inventory-backend/app/api/v1/inbound/stock.py
@@ -602,8 +602,10 @@ def add_draft():
         # 调整后的账面可用库存 = 账面总库存 - 借出未还数量
         adjusted_stock_qty = stock_qty - total_borrowed
 
-        # 查找是否已存在
-        draft = StocktakeDraft.query.filter_by(user_id=user_id, uuid=uuid, session_id=session_id).first()
+        # ★ 查找是否已存在：按 (session_id, uuid) 去重，不按 user_id 隔离
+        # 修复: 同一盘点单多个用户（手机/平板不同账号）操作同一物料时，
+        # 之前按 user_id 匹配导致每个用户各建一条 → 重复记录
+        draft = StocktakeDraft.query.filter_by(uuid=uuid, session_id=session_id).first()
 
         if draft:
             # 如果已存在，更新数量和时间
@@ -613,6 +615,8 @@ def add_draft():
             draft.diff_qty = quantity - adjusted_stock_qty
             draft.source_table = source_table
             draft.stock_id = stock_id
+            # 更新操作用户（最后操作者）
+            draft.user_id = user_id
             # ★ 新增: 保存备注
             if remark is not None:
                 draft.remark = remark.strip() if isinstance(remark, str) else remark