diff --git a/internal/biz/multi.go b/internal/biz/multi.go
index 2e4535a..9e1b08e 100644
--- a/internal/biz/multi.go
+++ b/internal/biz/multi.go
@@ -79,7 +79,7 @@ func (biz *MultiBiz) Notify(ctx context.Context, ip, source string, req *bo.Wech
 			return err
 		}
 
-		if order.ActivityId != "" {
+		if order.ActivityId == "" {
 			return fmt.Errorf("批次活动ID不为空，不是多笔立减金，请检查")
 		}