diff --git a/components/list/demo/loadmore.vue b/components/list/demo/loadmore.vue
index 087626631..cbcc55d01 100644
--- a/components/list/demo/loadmore.vue
+++ b/components/list/demo/loadmore.vue
@@ -19,54 +19,89 @@ Load more list with `loadMore` property.
 <template>
   <a-list
     class="demo-loadmore-list"
-    :loading="loading"
+    :loading="initLoading"
     item-layout="horizontal"
-    :data-source="dataList"
+    :data-source="list"
   >
     <template #loadMore>
-      <div :style="{ textAlign: 'center', marginTop: '12px', height: '32px', lineHeight: '32px' }">
-        <a-spin v-if="loadingMore" />
-        <a-button v-else @click="loadMore">loading more</a-button>
+      <div
+        v-if="!initLoading && !loading"
+        :style="{ textAlign: 'center', marginTop: '12px', height: '32px', lineHeight: '32px' }"
+      >
+        <a-button @click="onLoadMore">loading more</a-button>
       </div>
     </template>
     <template #renderItem="{ item }">
       <a-list-item>
         <template #actions>
-          <a>edit</a>
-          <a>more</a>
+          <a key="list-loadmore-edit">edit</a>
+          <a key="list-loadmore-more">more</a>
         </template>
-        <a-list-item-meta
-          description="Ant Design, a design language for background applications, is refined by Ant UED Team"
-        >
-          <template #title>
-            <a href="https://www.antdv.com/">{{ item.name.last }}</a>
-          </template>
-          <template #avatar>
-            <a-avatar src="https://joeschmoe.io/api/v1/random" />
-          </template>
-        </a-list-item-meta>
-        <div>content</div>
+        <a-skeleton avatar :title="false" :loading="!!item.loading" active>
+          <a-list-item-meta
+            description="Ant Design, a design language for background applications, is refined by Ant UED Team"
+          >
+            <template #title>
+              <a href="https://www.antdv.com/">{{ item.name.last }}</a>
+            </template>
+            <template #avatar>
+              <a-avatar :src="item.picture.large" />
+            </template>
+          </a-list-item-meta>
+          <div>content</div>
+        </a-skeleton>
       </a-list-item>
     </template>
   </a-list>
 </template>
 <script lang="ts">
-import { defineComponent } from 'vue';
-import { useLoadMore } from 'vue-request';
-
-const getFakeData = () => `https://randomuser.me/api/?results=5&inc=name,gender,email,nat&noinfo`;
+import { defineComponent, onMounted, ref, nextTick } from 'vue';
+const count = 3;
+const fakeDataUrl = `https://randomuser.me/api/?results=${count}&inc=name,gender,email,nat,picture&noinfo`;
 
 export default defineComponent({
   setup() {
-    const { dataList, loading, loadingMore, loadMore } = useLoadMore(getFakeData, {
-      listKey: 'results',
+    const initLoading = ref(true);
+    const loading = ref(false);
+    const data = ref([]);
+    const list = ref([]);
+    onMounted(() => {
+      fetch(fakeDataUrl)
+        .then(res => res.json())
+        .then(res => {
+          initLoading.value = false;
+          data.value = res.results;
+          list.value = res.results;
+        });
     });
 
+    const onLoadMore = () => {
+      loading.value = true;
+      list.value = data.value.concat(
+        [...new Array(count)].map(() => ({ loading: true, name: {}, picture: {} })),
+      );
+      fetch(fakeDataUrl)
+        .then(res => res.json())
+        .then(res => {
+          const newData = data.value.concat(res.results);
+          loading.value = false;
+          data.value = newData;
+          list.value = newData;
+          nextTick(() => {
+            // Resetting window's offsetTop so as to display react-virtualized demo underfloor.
+            // In real scene, you can using public method of react-virtualized:
+            // https://stackoverflow.com/questions/46700726/how-to-use-public-method-updateposition-of-react-virtualized
+            window.dispatchEvent(new Event('resize'));
+          });
+        });
+    };
+
     return {
       loading,
-      loadingMore,
-      dataList,
-      loadMore,
+      initLoading,
+      data,
+      list,
+      onLoadMore,
     };
   },
 });
diff --git a/components/list/index.tsx b/components/list/index.tsx
index 2b8db45d2..97f1ca7f9 100644
--- a/components/list/index.tsx
+++ b/components/list/index.tsx
@@ -10,6 +10,7 @@ import { Row } from '../grid';
 import Item from './Item';
 import { flattenChildren } from '../_util/props-util';
 import initDefaultProps from '../_util/props-util/initDefaultProps';
+import type { Key } from '../_util/type';
 import { tuple } from '../_util/type';
 import ItemMeta from './ItemMeta';
 import useConfigInject from '../_util/hooks/useConfigInject';
@@ -32,6 +33,7 @@ export interface ListGridType {
   lg?: ColumnCount;
   xl?: ColumnCount;
   xxl?: ColumnCount;
+  xxxl?: ColumnCount;
 }
 
 export const ListSize = tuple('small', 'default', 'large');
@@ -53,7 +55,7 @@ export const listProps = {
     ]),
   ),
   prefixCls: PropTypes.string,
-  rowKey: PropTypes.any,
+  rowKey: [String, Number, Function] as PropType<Key | ((item: any) => Key)>,
   renderItem: PropTypes.any,
   size: PropTypes.oneOf(ListSize),
   split: PropTypes.looseBool,
@@ -108,6 +110,8 @@ const List = defineComponent({
       }
     });
 
+    const listItemsKeys: Key[] = [];
+
     const triggerPaginationEvent = (eventName: string) => (page: number, pageSize: number) => {
       paginationCurrent.value = page;
       paginationSize.value = pageSize;
@@ -225,16 +229,16 @@ const List = defineComponent({
       return undefined;
     });
 
-    const renderInnerItem = (keys: number[], item: any, index: number) => {
+    const renderInnerItem = (item: any, index: number) => {
       const renderItem = props.renderItem ?? slots.renderItem;
       if (!renderItem) return null;
 
       let key;
-
-      if (typeof props.rowKey === 'function') {
-        key = props.rowKey(item);
-      } else if (typeof props.rowKey === 'string') {
-        key = item[props.rowKey];
+      const rowKeyType = typeof props.rowKey;
+      if (rowKeyType === 'function') {
+        key = (props.rowKey as any)(item);
+      } else if (rowKeyType === 'string' || rowKeyType === 'number') {
+        key = item[props.rowKey as any];
       } else {
         key = item.key;
       }
@@ -243,7 +247,7 @@ const List = defineComponent({
         key = `list-item-${index}`;
       }
 
-      keys[index] = key;
+      listItemsKeys[index] = key;
 
       return renderItem({ item, index });
     };
@@ -253,7 +257,6 @@ const List = defineComponent({
       const footer = props.footer ?? slots.footer?.();
       const header = props.header ?? slots.header?.();
       const children = flattenChildren(slots.default?.());
-      const keys = [];
       const isSomethingAfterLastItem = !!(loadMore || props.pagination || footer);
       const classString = {
         ...classObj.value,
@@ -271,11 +274,12 @@ const List = defineComponent({
 
       let childrenContent = isLoading.value && <div style={{ minHeight: '53px' }} />;
       if (splitDataSource.value.length > 0) {
+        listItemsKeys.length = 0;
         const items = splitDataSource.value.map((item: any, index: number) =>
-          renderInnerItem(keys, item, index),
+          renderInnerItem(item, index),
         );
         const childrenList = items.map((child: any, index) => (
-          <div key={keys[index]} style={colStyle.value}>
+          <div key={listItemsKeys[index]} style={colStyle.value}>
             {child}
           </div>
         ));
diff --git a/components/list/style/customize.less b/components/list/style/customize.less
index bbad35b7b..d0e2b84a8 100644
--- a/components/list/style/customize.less
+++ b/components/list/style/customize.less
@@ -1,5 +1,6 @@
-@import './index.less';
+@import '../../style/themes/index';
 
+@list-prefix-cls: ~'@{ant-prefix}-list';
 @card-prefix-cls: ~'@{ant-prefix}-card';
 
 .@{list-prefix-cls} {
diff --git a/components/list/style/index.less b/components/list/style/index.less
index 72e75eec4..6804e2412 100644
--- a/components/list/style/index.less
+++ b/components/list/style/index.less
@@ -26,6 +26,7 @@
   &-more {
     margin-top: @margin-sm;
     text-align: center;
+
     button {
       padding-right: 32px;
       padding-left: 32px;
@@ -66,30 +67,36 @@
       &-avatar {
         margin-right: @list-item-meta-avatar-margin-right;
       }
+
       &-content {
         flex: 1 0;
         width: 0;
         color: @text-color;
       }
+
       &-title {
         margin-bottom: 4px;
         color: @text-color;
         font-size: @font-size-base;
         line-height: @line-height-base;
+
         > a {
           color: @text-color;
           transition: all 0.3s;
+
           &:hover {
             color: @primary-color;
           }
         }
       }
+
       &-description {
         color: @text-color-secondary;
         font-size: @list-item-meta-description-font-size;
         line-height: @line-height-base;
       }
     }
+
     &-action {
       flex: 0 0 auto;
       margin-left: 48px;
@@ -146,6 +153,7 @@
 
   &-split &-item {
     border-bottom: 1px solid @border-color-split;
+
     &:last-child {
       border-bottom: none;
     }
@@ -204,6 +212,7 @@
 
       > li {
         padding: 0 @padding-md;
+
         &:first-child {
           padding-left: 0;
         }
diff --git a/components/list/style/index.ts b/components/list/style/index.tsx
similarity index 100%
rename from components/list/style/index.ts
rename to components/list/style/index.tsx
diff --git a/components/list/style/responsive.less b/components/list/style/responsive.less
index 151dec453..db7a108a3 100644
--- a/components/list/style/responsive.less
+++ b/components/list/style/responsive.less
@@ -20,6 +20,7 @@
   .@{list-prefix-cls} {
     &-item {
       flex-wrap: wrap;
+
       &-action {
         margin-left: 12px;
       }
@@ -29,9 +30,11 @@
   .@{list-prefix-cls}-vertical {
     .@{list-prefix-cls}-item {
       flex-wrap: wrap-reverse;
+
       &-main {
         min-width: 220px;
       }
+
       &-extra {
         margin: auto auto 16px;
       }