diff --git a/packages/fineui/src/widget/multilayerdownlist/combo.downlist.js b/packages/fineui/src/widget/multilayerdownlist/combo.downlist.js
index 56bf41107..e5a1e464d 100644
--- a/packages/fineui/src/widget/multilayerdownlist/combo.downlist.js
+++ b/packages/fineui/src/widget/multilayerdownlist/combo.downlist.js
@@ -23,6 +23,7 @@ export class MultiLayerDownListCombo extends Widget {
             container: null,
             stopPropagation: false,
             el: {},
+            popup: {},
         });
     }
 
@@ -65,6 +66,7 @@ export class MultiLayerDownListCombo extends Widget {
                 el: this.popupview,
                 stopPropagation: o.stopPropagation,
                 maxHeight: 1000,
+                ...o.popup,
             },
         });