diff --git a/bundle/spacevim/autoload/spacevimcn.vim b/bundle/spacevim/autoload/spacevimcn.vim
index 8b72a82aa..f28bc1d7d 100644
--- a/bundle/spacevim/autoload/spacevimcn.vim
+++ b/bundle/spacevim/autoload/spacevimcn.vim
@@ -45,6 +45,10 @@ scriptencoding utf-8
 " <
 let g:spacevim_default_indent          = 2
 
+""
+" 在输入模式下，使用空格替代 `<Tab>`
+let g:spacevim_expand_tab              = 1
+
 ""
 " @section relativenumber, options-relativenumber
 " @parentsection options
diff --git a/bundle/spacevim/doc/SpaceVim.txt b/bundle/spacevim/doc/SpaceVim.txt
index eb9056529..987198f65 100644
--- a/bundle/spacevim/doc/SpaceVim.txt
+++ b/bundle/spacevim/doc/SpaceVim.txt
@@ -67,6 +67,9 @@ CONFIGURATION                                                *SpaceVim-config*
   let g:spacevim_default_indent = 2
 <
 
+                                                       *g:spacevim_expand_tab*
+在输入模式下，使用空格替代 `<Tab>`
+
                                                    *g:spacevim_relativenumber*
 启用/禁用相对行号，相对行号可以用于快速上下多行移动，默认已启用。