diff --git a/doc/fluid/api/gen_index.py b/doc/fluid/api/gen_index.py
index 4189918e875..51aa256fe06 100644
--- a/doc/fluid/api/gen_index.py
+++ b/doc/fluid/api/gen_index.py
@@ -10,7 +10,7 @@
 =============
 
 ..  toctree::
-
+    :maxdepth: 1
 
 ''')
     file_object.write('    ../api_guides/index_en.rst'+'\n')
diff --git a/doc/fluid/api/index_en.rst b/doc/fluid/api/index_en.rst
index d49136c06b7..b66676b23a3 100644
--- a/doc/fluid/api/index_en.rst
+++ b/doc/fluid/api/index_en.rst
@@ -3,7 +3,7 @@ API Reference
 =============
 
 ..  toctree::
-
+    :maxdepth: 1
 
     ../api_guides/index_en.rst
     fluid.rst
diff --git a/doc/fluid/api_cn/gen_index.py b/doc/fluid/api_cn/gen_index.py
index 9e77c1d1958..860866b025b 100644
--- a/doc/fluid/api_cn/gen_index.py
+++ b/doc/fluid/api_cn/gen_index.py
@@ -10,7 +10,7 @@
 =============
 
 ..  toctree::
-
+    :maxdepth: 1
 
 ''')
     file_object.write('    ../api_guides/index.rst'+'\n')
diff --git a/doc/fluid/api_cn/index_cn.rst b/doc/fluid/api_cn/index_cn.rst
index 2b0266f6eea..5686f640f8f 100644
--- a/doc/fluid/api_cn/index_cn.rst
+++ b/doc/fluid/api_cn/index_cn.rst
@@ -3,7 +3,7 @@ API
 =====
 
 ..  toctree::
-
+    :maxdepth: 1
 
     ../api_guides/index.rst
     fluid_cn.rst