diff --git a/packages/fineui/src/base/list/virtualgrouplist.js b/packages/fineui/src/base/list/virtualgrouplist.js
index 40bbaf9a5..e2e0d5ddf 100644
--- a/packages/fineui/src/base/list/virtualgrouplist.js
+++ b/packages/fineui/src/base/list/virtualgrouplist.js
@@ -1,4 +1,4 @@
-import { VerticalLayout, Layout, Widget, shortcut, extend, isFunction, isNumber, PrefixIntervalTree, ResizeDetector } from "@/core";
+import { VerticalLayout, Layout, Widget, shortcut, extend, isFunction, isNumber, sum, PrefixIntervalTree, ResizeDetector } from "@/core";
 import { VirtualGroup } from "../combination";
 
 /**
@@ -201,7 +201,7 @@ export class VirtualGroupList extends Widget {
         const o = this.options;
         this.renderedIndex = -1;
         if (isFunction(o.rowHeight)) {
-            this.summaryHeight = BI.sum(o.items, o.rowHeight);
+            this.summaryHeight = sum(o.items, o.rowHeight);
         } else {
             this.summaryHeight = this._isAutoHeight() ? 0 : o.rowHeight * o.items.length;
         }