diff --git a/inventory-backend/app/services/borrow_service.py b/inventory-backend/app/services/borrow_service.py
index df81e17..3dbc33e 100644
--- a/inventory-backend/app/services/borrow_service.py
+++ b/inventory-backend/app/services/borrow_service.py
@@ -559,6 +559,14 @@ class BorrowApprovalService:
             from app.services.inventory_reservation import release_reserved
             restored = release_reserved(approval.get_items())
 
+            # ★ 清理该单据的扫码草稿（含其他用户的）。
+            #   撤回后单据状态变为 4，不再出现在扫码页的下拉里（那里只拉 status=1），
+            #   草稿从此成为永远读不到的死数据。
+            from app.models.scan_draft import ScanDraft
+            ScanDraft.query.filter_by(
+                biz_type='borrow', request_id=approval.id
+            ).delete(synchronize_session=False)
+
             approval.status = 4  # 已撤回/已完结
             db.session.commit()
             return True, f"申请单已撤回，释放 {restored} 项预占库存", approval
diff --git a/inventory-backend/app/services/outbound_service.py b/inventory-backend/app/services/outbound_service.py
index f795b7d..0d2bbf5 100644
--- a/inventory-backend/app/services/outbound_service.py
+++ b/inventory-backend/app/services/outbound_service.py
@@ -1327,6 +1327,18 @@ class OutboundApprovalService:
             from app.services.inventory_reservation import release_reserved
             restored = release_reserved(approval.get_items())
 
+            # ★ 清理该单据的扫码草稿。
+            #   草稿按 (user_id, request_id) 隔离，撤回后单据状态变为 4，
+            #   不会再出现在扫码页的单据下拉里（那里只拉 status=1），
+            #   草稿从此成为永远读不到的死数据。此处一并清掉。
+            #
+            #   注意：要清**所有用户**在这张单上的草稿，而非仅撤回者自己的 ——
+            #   可能有多人扫过同一张单，只清自己的会留下他人的孤儿数据。
+            from app.models.scan_draft import ScanDraft
+            ScanDraft.query.filter_by(
+                biz_type='outbound', request_id=approval.id
+            ).delete(synchronize_session=False)
+
             approval.status = 4  # 4-已撤回/已完结
             approval.actual_approver_id = user_id
             approval.approved_at = None