diff --git a/tdesign-component/example/assets/api/indexes_api.md b/tdesign-component/example/assets/api/indexes_api.md
index 81168ad22..666e46457 100644
--- a/tdesign-component/example/assets/api/indexes_api.md
+++ b/tdesign-component/example/assets/api/indexes_api.md
@@ -43,6 +43,7 @@
 | builderAnchor | Widget? Function(BuildContext context, String index, bool isPinnedToTop)? | - | 锚点自定义构建 |
 | builderContent | Widget? Function(BuildContext context, String index) | - | 内容自定义构建 |
 | builderIndex | Widget Function(BuildContext context, String index, bool isActive)? | - | 索引文本自定义构建，包括索引激活左侧提示 |
+| builderSliverContent | Widget? Function(BuildContext context, String index)? | - | 内容自定义Sliver构建，用于大数据量场景实现懒加载，性能优于builderContent。 |
 | capsuleTheme | bool? | false | 锚点是否为胶囊式样式 |
 | indexList | List<String>? | - | 索引字符列表。不传默认 A-Z |
 | indexListMaxHeight | double? | 0.8 | 索引列表最大高度（父容器高度的百分比，默认 0.8） |
diff --git a/tdesign-component/lib/src/components/indexes/t_indexes.dart b/tdesign-component/lib/src/components/indexes/t_indexes.dart
index 26566a112..d66c6804e 100644
--- a/tdesign-component/lib/src/components/indexes/t_indexes.dart
+++ b/tdesign-component/lib/src/components/indexes/t_indexes.dart
@@ -23,6 +23,7 @@ class TIndexes extends StatefulWidget {
     this.onChange,
     this.onSelect,
     required this.builderContent,
+    this.builderSliverContent,
     this.builderAnchor,
     this.builderIndex,
   }) : super(key: key);
@@ -57,6 +58,11 @@ class TIndexes extends StatefulWidget {
   /// 内容自定义构建
   final Widget? Function(BuildContext context, String index) builderContent;
 
+  /// 内容自定义Sliver构建，用于大数据量场景实现懒加载，性能优于builderContent。
+  /// 返回Sliver类型Widget（如SliverList.builder），优先级高于builderContent。
+  final Widget? Function(BuildContext context, String index)?
+      builderSliverContent;
+
   /// 锚点自定义构建
   final Widget? Function(
       BuildContext context, String index, bool isPinnedToTop)? builderAnchor;
@@ -144,6 +150,32 @@ class _TIndexesState extends State<TIndexes> {
     _contentKeys.clear();
     return _indexList.map((e) {
       final isPinnedOffset = capsuleTheme && _activeIndex.value == e;
+
+      Widget contentSliver;
+      if (widget.builderSliverContent != null) {
+        contentSliver = Builder(
+          builder: (context) {
+            _contentKeys[e] = context;
+            return widget.builderSliverContent!(context, e) ??
+                const SliverToBoxAdapter(child: SizedBox.shrink());
+          },
+        );
+      } else {
+        contentSliver = SliverToBoxAdapter(
+          child: Builder(
+            builder: (context) {
+              _contentKeys[e] = context;
+              return Padding(
+                padding: isPinnedOffset
+                    ? EdgeInsets.only(top: TTheme.of(context).spacer8)
+                    : EdgeInsets.zero,
+                child: widget.builderContent(context, e),
+              );
+            },
+          ),
+        );
+      }
+
       return SliverStickyHeader.builder(
         sticky: widget.sticky ?? true,
         pinnedOffset: isPinnedOffset
@@ -165,19 +197,7 @@ class _TIndexesState extends State<TIndexes> {
             sticky: widget.sticky ?? true,
           );
         },
-        sliver: SliverToBoxAdapter(
-          child: Builder(
-            builder: (context) {
-              _contentKeys[e] = context;
-              return Padding(
-                padding: isPinnedOffset
-                    ? EdgeInsets.only(top: TTheme.of(context).spacer8)
-                    : EdgeInsets.zero,
-                child: widget.builderContent(context, e),
-              );
-            },
-          ),
-        ),
+        sliver: contentSliver,
       );
     }).toList();
   }
diff --git a/tdesign-site/src/indexes/README.md b/tdesign-site/src/indexes/README.md
index 1d3fb2fb0..7884f348b 100644
--- a/tdesign-site/src/indexes/README.md
+++ b/tdesign-site/src/indexes/README.md
@@ -249,6 +249,7 @@ Widget _buildOther(BuildContext context) {
 | builderAnchor | Widget? Function(BuildContext context, String index, bool isPinnedToTop)? | - | 锚点自定义构建 |
 | builderContent | Widget? Function(BuildContext context, String index) | - | 内容自定义构建 |
 | builderIndex | Widget Function(BuildContext context, String index, bool isActive)? | - | 索引文本自定义构建，包括索引激活左侧提示 |
+| builderSliverContent | Widget? Function(BuildContext context, String index)? | - | 内容自定义Sliver构建，用于大数据量场景实现懒加载，性能优于builderContent。 |
 | capsuleTheme | bool? | false | 锚点是否为胶囊式样式 |
 | indexList | List<String>? | - | 索引字符列表。不传默认 A-Z |
 | indexListMaxHeight | double? | 0.8 | 索引列表最大高度（父容器高度的百分比，默认 0.8） |