diff --git a/inventory-backend/app/api/v1/scrap.py b/inventory-backend/app/api/v1/scrap.py
index ed1b423..5453f91 100644
--- a/inventory-backend/app/api/v1/scrap.py
+++ b/inventory-backend/app/api/v1/scrap.py
@@ -503,14 +503,19 @@ def _current_user_role():
 @jwt_required()
 @permission_required('scrap_apply')
 def scrap_check_approval():
-    """提交前预检：判断所选库存(物料)是否命中“需审批”"""
+    """
+    提交前预检：报废一律需审批，本接口返回 need_approval=true，
+    并附带命中「需审批物料」标记的明细，供前端展示审批提示文案。
+    """
     try:
         from app.services.approval_control import resolve_approval_control
+        from app.services.scrap_approval_service import SCRAP_ALWAYS_REQUIRES_APPROVAL
         data = request.get_json() or {}
         items = data.get('items', []) or []
-        need, flagged = resolve_approval_control(items)
+        _, flagged = resolve_approval_control(items)
         return jsonify({'code': 200, 'msg': 'success',
-                        'data': {'need_approval': need, 'materials': flagged}}), 200
+                        'data': {'need_approval': SCRAP_ALWAYS_REQUIRES_APPROVAL,
+                                 'materials': flagged}}), 200
     except Exception as e:
         traceback.print_exc()
         return jsonify({'code': 500, 'msg': f'预检失败: {str(e)}'}), 500
diff --git a/inventory-backend/app/services/scrap_approval_service.py b/inventory-backend/app/services/scrap_approval_service.py
index 5dd0f35..0e3f9cd 100644
--- a/inventory-backend/app/services/scrap_approval_service.py
+++ b/inventory-backend/app/services/scrap_approval_service.py
@@ -21,6 +21,16 @@ def _beijing():
     return beijing_time()
 
 
+# =============================================================================
+# ★ 业务规则（单一事实来源）：报废一律需审批
+#
+# 与出库/借库不同，报废不过滤 is_approval_required —— 无论物料是否命中该标记，
+# 所有报废申请都必须由指定审批人审批通过后才能执行。
+# 前端 apply/index.vue 的「审批人」必填项与此规则保持一致。
+# =============================================================================
+SCRAP_ALWAYS_REQUIRES_APPROVAL = True
+
+
 STOCK_MODELS = {}
 
 
@@ -101,21 +111,19 @@ class ScrapApprovalService:
                 'available_at_apply': avail,
             })
 
-        # ★ 是否需审批：命中需审批物料 或 库管代建(force_approval)
+        # ★ 报废一律需审批（见 SCRAP_ALWAYS_REQUIRES_APPROVAL）。
+        #   resolve_approval_control 仍调用，但仅用于生成「哪些物料命中需审批」的提示文案，
+        #   不再用它决定是否需要审批。
         from app.services.approval_control import resolve_approval_control
-        need_approval, flagged_materials = resolve_approval_control(normalized)
-        if force_approval:
-            need_approval = True
-        if need_approval and not approver_id:
-            if force_approval:
-                raise ValueError("库管代建报废申请必须选择审批人后再提交")
-            _names = "；".join(f"{m['name']}（{m['spec_model'] or '-'}）" for m in flagged_materials)
-            raise ValueError(f"以下物料需审批报废：{_names}。请选择审批人后再提交")
+        _, flagged_materials = resolve_approval_control(normalized)
 
-        if approver_id:
-            allowed_approvers = [{"type": "user", "value": int(approver_id)}]
-        elif not need_approval:
-            allowed_approvers = []
+        if not approver_id:
+            if flagged_materials:
+                _names = "；".join(f"{m['name']}（{m['spec_model'] or '-'}）" for m in flagged_materials)
+                raise ValueError(f"以下物料需审批报废：{_names}。请选择审批人后再提交")
+            raise ValueError("报废申请必须选择审批人后再提交")
+
+        allowed_approvers = [{"type": "user", "value": int(approver_id)}]
 
         req = ScrapApproval(
             request_no=ScrapApprovalService.generate_request_no(),
@@ -125,17 +133,12 @@ class ScrapApprovalService:
         req.set_items(normalized)
         req.set_allowed_approvers(allowed_approvers)
 
-        if need_approval:
-            req.status = 0  # 待审批
-        else:
-            # 默认不审批：直接进入“待执行”
-            req.status = 1
-            req.actual_approver_id = applicant_id
-            req.approved_at = _beijing()
+        # ★ 恒为「待审批」，不再走免审批自动通过分支
+        req.status = 0
 
         db.session.add(req)
         db.session.commit()
-        logger.info(f"[ScrapApproval] 提交成功 {req.request_no} need_approval={need_approval}")
+        logger.info(f"[ScrapApproval] 提交成功 {req.request_no} approver={approver_id}")
         return req
 
     # ------------------------------------------------------------------