diff --git a/docs/index.rst b/docs/index.rst
index c241f091ed2cae906879f98b769bc6b7ce830fe1..b2fba7daba51c68207af27e249559c18ab10235f 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -59,7 +59,14 @@ Welcome to Paddle-Lite's documentation!
   demo_guides/baidu_xpu
   demo_guides/rockchip_npu
   demo_guides/mediatek_apu
-  
+
+.. toctree::
+  :maxdepth: 1
+  :caption: 训练示例（预览）
+  :name: sec-train_demo_guides
+
+  demo_guides/cpp_train_demo
+
 .. toctree::
   :maxdepth: 1
   :caption: API文档