diff --git a/autoload/SpaceVim.vim b/autoload/SpaceVim.vim
index 595f57888..66bfc89ed 100644
--- a/autoload/SpaceVim.vim
+++ b/autoload/SpaceVim.vim
@@ -1647,6 +1647,40 @@ endfunction
 "   General guide for using SpaceVim. Including layer configuration, bootstrap
 "   function.
 
+""
+" @section undo-tree, usage-undotree
+" @parentsection usage
+" Undo tree visualizes the undo history and makes it easier to browse and
+" switch between different undo branches.The default key binding is `F7`.
+" If `+python` or `+python3` is enabled, `vim-mundo` will be used,
+" otherwise `undotree` will be used.
+" 
+" Key bindings within undo tree windows:
+" >
+"    key bindings     description
+"    `G`              move bottom
+"    `J`              move older write
+"    `K`              move newer write
+"    `N`              previous match
+"    `P`              play to
+"    `<2-LeftMouse>`  mouse click
+"    `/`              search
+"    `<CR>`           preview
+"    `d`              diff
+"    `<down>`         move older
+"    `<up>`           move newer
+"    `i`              toggle inline
+"    `j`              move older
+"    `k`              move newer
+"    `n`              next match
+"    `o`              preview
+"    `p`              diff current buffer
+"    `q`              quit
+"    `r`              diff
+"    `gg`             move top
+"    `?`              toggle help
+" <
+
 ""
 " @section windows-and-tabs, usage-windows-and-tabs
 " @parentsection usage
diff --git a/doc/SpaceVim.txt b/doc/SpaceVim.txt
index 531c88235..9d3091f0d 100644
--- a/doc/SpaceVim.txt
+++ b/doc/SpaceVim.txt
@@ -215,7 +215,8 @@ CONTENTS                                                   *SpaceVim-contents*
       4. repl............................................|SpaceVim-usage-repl|
       5. search-and-replace................|SpaceVim-usage-search-and-replace|
       6. tasks..........................................|SpaceVim-usage-tasks|
-      7. windows-and-tabs....................|SpaceVim-usage-windows-and-tabs|
+      7. undo-tree...................................|SpaceVim-usage-undotree|
+      8. windows-and-tabs....................|SpaceVim-usage-windows-and-tabs|
   8. API........................................................|SpaceVim-api|
       1. cmdlinemenu................................|SpaceVim-api-cmdlinemenu|
       2. data#dict....................................|SpaceVim-api-data-dict|
@@ -5129,6 +5130,40 @@ TASKS                                                   *SpaceVim-usage-tasks*
 
 general guide for tasks manager in SpaceVim.
 
+==============================================================================
+UNDO-TREE                                            *SpaceVim-usage-undotree*
+
+Undo tree visualizes the undo history and makes it easier to browse and switch
+between different undo branches.The default key binding is `F7`. If `+python`
+or `+python3` is enabled, `vim-mundo` will be used, otherwise `undotree` will
+be used.
+
+Key bindings within undo tree windows:
+>
+   key bindings     description
+   `G`              move bottom
+   `J`              move older write
+   `K`              move newer write
+   `N`              previous match
+   `P`              play to
+   `<2-LeftMouse>`  mouse click
+   `/`              search
+   `<CR>`           preview
+   `d`              diff
+   `<down>`         move older
+   `<up>`           move newer
+   `i`              toggle inline
+   `j`              move older
+   `k`              move newer
+   `n`              next match
+   `o`              preview
+   `p`              diff current buffer
+   `q`              quit
+   `r`              diff
+   `gg`             move top
+   `?`              toggle help
+<
+
 ==============================================================================
 WINDOWS-AND-TABS                             *SpaceVim-usage-windows-and-tabs*