diff --git a/autoload/SpaceVim/layers/git.vim b/autoload/SpaceVim/layers/git.vim
index 1cdbdb52e..5bc5e3847 100644
--- a/autoload/SpaceVim/layers/git.vim
+++ b/autoload/SpaceVim/layers/git.vim
@@ -22,6 +22,13 @@
 "     name = 'git'
 "     git_plugin = 'git'
 " <
+" `git_diff_position`: set the default command to split diff windows, by
+" default it is `10split`. Example:
+" >
+"   [[layers]]
+"     name = 'git'
+"     git_diff_position = 'vsplit'
+" <
 " @subsection Key bindings
 "
 " The following key bindings will be definded when the `git` layer is loaded.
@@ -152,6 +159,7 @@ function! SpaceVim#layers#git#set_variable(var) abort
         \ get(a:var,
         \ 'git-plugin',
         \ s:git_plugin))
+  let g:git_diff_position = get(a:var, 'git_diff_position', '10split')
 
 endfunction
 
diff --git a/bundle/git.vim/autoload/git/diff.vim b/bundle/git.vim/autoload/git/diff.vim
index d6528d4ff..1d92d9992 100644
--- a/bundle/git.vim/autoload/git/diff.vim
+++ b/bundle/git.vim/autoload/git/diff.vim
@@ -40,7 +40,7 @@ endfunction
 
 
 function! s:openDiffBuffer() abort
-    10split git://diff
+    exe printf('%s git://diff', get(g:, 'git_diff_position', '10split'))
     normal! "_dd
     setl nobuflisted
     setl nomodifiable
diff --git a/doc/SpaceVim.txt b/doc/SpaceVim.txt
index af42fff5f..8b04de030 100644
--- a/doc/SpaceVim.txt
+++ b/doc/SpaceVim.txt
@@ -1938,6 +1938,13 @@ is `git`, the following plugins are supported: `gina`, `fugitive` and `gita`.
     name = 'git'
     git_plugin = 'git'
 <
+`git_diff_position`: set the default command to split diff windows, by default
+it is `10split`. Example:
+>
+  [[layers]]
+    name = 'git'
+    git_diff_position = 'vsplit'
+<
 KEY BINDINGS
 
 The following key bindings will be definded when the `git` layer is loaded.