diff --git a/docs/source/fastNLP.core.rst b/docs/source/fastNLP.core.rst
index cacc6622..08d161b7 100644
--- a/docs/source/fastNLP.core.rst
+++ b/docs/source/fastNLP.core.rst
@@ -6,11 +6,10 @@ fastNLP.core
    :undoc-members:
    :show-inheritance:
 
-子模块
+Submodules
 ----------
 
 .. toctree::
-   :maxdepth: 1
 
    fastNLP.core.batch
    fastNLP.core.callback
diff --git a/docs/source/fastNLP.embeddings.rst b/docs/source/fastNLP.embeddings.rst
index 6b168906..6872e91d 100644
--- a/docs/source/fastNLP.embeddings.rst
+++ b/docs/source/fastNLP.embeddings.rst
@@ -6,11 +6,10 @@ fastNLP.embeddings
    :undoc-members:
    :show-inheritance:
 
-子模块
+Submodules
 ----------
 
 .. toctree::
-   :maxdepth: 1
 
    fastNLP.embeddings.bert_embedding
    fastNLP.embeddings.char_embedding
diff --git a/docs/source/fastNLP.io.data_loader.rst b/docs/source/fastNLP.io.data_loader.rst
index 8f990102..0b4f5d0b 100644
--- a/docs/source/fastNLP.io.data_loader.rst
+++ b/docs/source/fastNLP.io.data_loader.rst
@@ -1,7 +1,8 @@
 fastNLP.io.data\_loader
-==========================
+=======================
 
 .. automodule:: fastNLP.io.data_loader
    :members:
    :undoc-members:
-   :show-inheritance:
\ No newline at end of file
+   :show-inheritance:
+
diff --git a/docs/source/fastNLP.io.file_utils.rst b/docs/source/fastNLP.io.file_utils.rst
new file mode 100644
index 00000000..944550d7
--- /dev/null
+++ b/docs/source/fastNLP.io.file_utils.rst
@@ -0,0 +1,7 @@
+fastNLP.io.file\_utils
+======================
+
+.. automodule:: fastNLP.io.file_utils
+   :members:
+   :undoc-members:
+   :show-inheritance:
diff --git a/docs/source/fastNLP.io.loader.rst b/docs/source/fastNLP.io.loader.rst
new file mode 100644
index 00000000..bbdc1d7a
--- /dev/null
+++ b/docs/source/fastNLP.io.loader.rst
@@ -0,0 +1,8 @@
+fastNLP.io.loader
+=================
+
+.. automodule:: fastNLP.io.loader
+   :members:
+   :undoc-members:
+   :show-inheritance:
+
diff --git a/docs/source/fastNLP.io.pipe.rst b/docs/source/fastNLP.io.pipe.rst
new file mode 100644
index 00000000..bf126585
--- /dev/null
+++ b/docs/source/fastNLP.io.pipe.rst
@@ -0,0 +1,8 @@
+fastNLP.io.pipe
+===============
+
+.. automodule:: fastNLP.io.pipe
+   :members:
+   :undoc-members:
+   :show-inheritance:
+
diff --git a/docs/source/fastNLP.io.rst b/docs/source/fastNLP.io.rst
index a97ed67d..0a006709 100644
--- a/docs/source/fastNLP.io.rst
+++ b/docs/source/fastNLP.io.rst
@@ -6,14 +6,23 @@ fastNLP.io
    :undoc-members:
    :show-inheritance:
 
-子模块
+Subpackages
+-----------
+
+.. toctree::
+
+   fastNLP.io.data_loader
+   fastNLP.io.loader
+   fastNLP.io.pipe
+
+Submodules
 ----------
 
 .. toctree::
-   :maxdepth: 1
 
    fastNLP.io.base_loader
-   fastNLP.io.embed_loader
    fastNLP.io.dataset_loader
-   fastNLP.io.data_loader
+   fastNLP.io.embed_loader
+   fastNLP.io.file_utils
    fastNLP.io.model_io
+   fastNLP.io.utils
diff --git a/docs/source/fastNLP.io.utils.rst b/docs/source/fastNLP.io.utils.rst
new file mode 100644
index 00000000..0b3f3938
--- /dev/null
+++ b/docs/source/fastNLP.io.utils.rst
@@ -0,0 +1,7 @@
+fastNLP.io.utils
+================
+
+.. automodule:: fastNLP.io.utils
+   :members:
+   :undoc-members:
+   :show-inheritance:
diff --git a/docs/source/fastNLP.models.rst b/docs/source/fastNLP.models.rst
index 2ea546e2..36875b85 100644
--- a/docs/source/fastNLP.models.rst
+++ b/docs/source/fastNLP.models.rst
@@ -6,11 +6,10 @@ fastNLP.models
    :undoc-members:
    :show-inheritance:
 
-子模块
+Submodules
 ----------
 
 .. toctree::
-   :maxdepth: 1
 
    fastNLP.models.biaffine_parser
    fastNLP.models.cnn_text_classification
diff --git a/docs/source/fastNLP.modules.encoder.rst b/docs/source/fastNLP.modules.encoder.rst
index 0562f12d..e60f9fa4 100644
--- a/docs/source/fastNLP.modules.encoder.rst
+++ b/docs/source/fastNLP.modules.encoder.rst
@@ -5,3 +5,4 @@ fastNLP.modules.encoder
    :members:
    :undoc-members:
    :show-inheritance:
+
diff --git a/docs/source/fastNLP.modules.rst b/docs/source/fastNLP.modules.rst
index 646ef2d3..06494b53 100644
--- a/docs/source/fastNLP.modules.rst
+++ b/docs/source/fastNLP.modules.rst
@@ -6,12 +6,17 @@ fastNLP.modules
    :undoc-members:
    :show-inheritance:
 
-子模块
+Subpackages
 -----------
 
 .. toctree::
-   :titlesonly:
-   :maxdepth: 1
 
    fastNLP.modules.decoder
-   fastNLP.modules.encoder
\ No newline at end of file
+   fastNLP.modules.encoder
+
+Submodules
+----------
+
+.. toctree::
+
+   fastNLP.modules.utils
diff --git a/docs/source/fastNLP.modules.utils.rst b/docs/source/fastNLP.modules.utils.rst
new file mode 100644
index 00000000..c0219435
--- /dev/null
+++ b/docs/source/fastNLP.modules.utils.rst
@@ -0,0 +1,7 @@
+fastNLP.modules.utils
+=====================
+
+.. automodule:: fastNLP.modules.utils
+   :members:
+   :undoc-members:
+   :show-inheritance:
diff --git a/docs/source/fastNLP.rst b/docs/source/fastNLP.rst
index 0057a184..e3ba429d 100644
--- a/docs/source/fastNLP.rst
+++ b/docs/source/fastNLP.rst
@@ -1,16 +1,15 @@
-API 文档
-===============
+fastNLP
+=======
 
 .. automodule:: fastNLP
    :members:
    :undoc-members:
    :show-inheritance:
 
-内部模块
+Subpackages
 -----------
 
 .. toctree::
-   :maxdepth: 1
 
    fastNLP.core
    fastNLP.embeddings
diff --git a/docs/source/modules.rst b/docs/source/modules.rst
index 9ca3c7f3..e9a92cb7 100644
--- a/docs/source/modules.rst
+++ b/docs/source/modules.rst
@@ -2,7 +2,6 @@ fastNLP
 =======
 
 .. toctree::
-   :titlesonly:
    :maxdepth: 4
 
    fastNLP