diff --git a/jikimo_purchase_request/wizard/purchase_request_line_make_purchase_order.py b/jikimo_purchase_request/wizard/purchase_request_line_make_purchase_order.py
index 1aa20e4c..3c997f76 100644
--- a/jikimo_purchase_request/wizard/purchase_request_line_make_purchase_order.py
+++ b/jikimo_purchase_request/wizard/purchase_request_line_make_purchase_order.py
@@ -95,6 +95,12 @@ class PurchaseRequestLineMakePurchaseOrder(models.TransientModel):
                     % line.request_id.name
                 )
         super(PurchaseRequestLineMakePurchaseOrder, self)._check_valid_request_line(request_line_ids)
+    
+    @api.model
+    def check_group(self, request_lines):
+        # 去掉合并必须同一采购组的限制
+        pass
+        
 
 class PurchaseRequestLineMakePurchaseOrderItem(models.TransientModel):
     _inherit = "purchase.request.line.make.purchase.order.item"