diff --git a/autoload/SpaceVim.vim b/autoload/SpaceVim.vim
index 5259bc3e8..9929c8288 100644
--- a/autoload/SpaceVim.vim
+++ b/autoload/SpaceVim.vim
@@ -498,6 +498,7 @@ let g:spacevim_colorscheme_default     = 'desert'
 let g:spacevim_simple_mode             = 0
 ""
 " The default file manager of SpaceVim. Default is 'vimfiler'.
+" you can also use nerdtree or defx
 let g:spacevim_filemanager             = 'vimfiler'
 
 let g:spacevim_sidebar_direction        = ''
@@ -685,6 +686,7 @@ let g:spacevim_smartcloseignorewin     = ['__Tagbar__' , 'vimfiler:default']
 let g:spacevim_smartcloseignoreft      = [
       \ 'tagbar',
       \ 'vimfiler',
+      \ 'defx',
       \ 'SpaceVimRunner',
       \ 'SpaceVimREPL',
       \ 'SpaceVimQuickFix',
@@ -963,6 +965,9 @@ function! SpaceVim#welcome() abort
     if exists(':VimFiler') == 2
       VimFiler
       wincmd p
+    elseif exists(':Defx') == 2
+      Defx
+      wincmd p
     endif
   endif
 endfunction
diff --git a/autoload/SpaceVim/layers/core.vim b/autoload/SpaceVim/layers/core.vim
index 11a0a45d2..367584cc8 100644
--- a/autoload/SpaceVim/layers/core.vim
+++ b/autoload/SpaceVim/layers/core.vim
@@ -17,6 +17,8 @@ function! SpaceVim#layers#core#plugins() abort
     call add(plugins, ['Shougo/vimfiler.vim',{'merged' : 0, 'loadconf' : 1 , 'loadconf_before' : 1, 'on_cmd' : ['VimFiler', 'VimFilerBufferDir']}])
     call add(plugins, ['Shougo/unite.vim',{ 'merged' : 0 , 'loadconf' : 1}])
     call add(plugins, ['Shougo/vimproc.vim', {'build' : [(executable('gmake') ? 'gmake' : 'make')]}])
+  elseif g:spacevim_filemanager ==# 'defx'
+    call add(plugins, ['Shougo/defx.nvim',{'merged' : 0, 'loadconf' : 1 , 'loadconf_before' : 1}])
   endif
 
   if !g:spacevim_vimcompatible
@@ -183,6 +185,12 @@ function! SpaceVim#layers#core#config() abort
     call SpaceVim#mapping#space#def('nnoremap', ['f', 'T'], 'NERDTree', 'show_file_tree', 1)
     call SpaceVim#mapping#space#def('nnoremap', ['f', 'o'], 'NERDTreeFind', 'open_file_tree', 1)
     call SpaceVim#mapping#space#def('nnoremap', ['b', 't'], 'NERDTree %', 'show_file_tree_at_buffer_dir', 1)
+  elseif g:spacevim_filemanager ==# 'defx'
+    " TODO: fix all these command
+    call SpaceVim#mapping#space#def('nnoremap', ['f', 't'], 'Defx', 'toggle_file_tree', 1)
+    call SpaceVim#mapping#space#def('nnoremap', ['f', 'T'], 'Defx -no-toggle', 'show_file_tree', 1)
+    call SpaceVim#mapping#space#def('nnoremap', ['f', 'o'], 'Defx -find', 'open_file_tree', 1)
+    call SpaceVim#mapping#space#def('nnoremap', ['b', 't'], 'Defx -no-toggle', 'show_file_tree_at_buffer_dir', 1)
   endif
   call SpaceVim#mapping#space#def('nnoremap', ['f', 'y'], 'call zvim#util#CopyToClipboard()', 'show-and-copy-buffer-filename', 1)
   let g:_spacevim_mappings_space.f.v = {'name' : '+Vim(SpaceVim)'}
diff --git a/autoload/SpaceVim/layers/core/statusline.vim b/autoload/SpaceVim/layers/core/statusline.vim
index 21c19ab22..c9bb07dd4 100644
--- a/autoload/SpaceVim/layers/core/statusline.vim
+++ b/autoload/SpaceVim/layers/core/statusline.vim
@@ -351,6 +351,9 @@ function! SpaceVim#layers#core#statusline#get(...) abort
           \ . '%#SpaceVim_statusline_b#'
           \ . ' vimfiler %#SpaceVim_statusline_b_SpaceVim_statusline_c#'
           \ . s:lsep
+  elseif &filetype ==# 'defx'
+    return '%#SpaceVim_statusline_ia#' . s:winnr(1) . '%#SpaceVim_statusline_ia_SpaceVim_statusline_b#' . s:lsep
+          \ . '%#SpaceVim_statusline_b# defx %#SpaceVim_statusline_b_SpaceVim_statusline_c#' . s:lsep . ' '
   elseif &filetype ==# 'gista-list'
     return '%#SpaceVim_statusline_ia#'
           \ . s:winnr(1) . '%#SpaceVim_statusline_ia_SpaceVim_statusline_b#'
diff --git a/autoload/zvim.vim b/autoload/zvim.vim
index 7748ca990..930d60e7a 100644
--- a/autoload/zvim.vim
+++ b/autoload/zvim.vim
@@ -114,4 +114,4 @@ function! s:search_line(path, term) abort "{{{
   return 0
 endfunction "}}}
 
-" vim:set et sw=2:
+" vim:set et sw=2 cc=80 nowrap:
diff --git a/autoload/zvim/plug.vim b/autoload/zvim/plug.vim
index eb89e9c3d..ac9af7973 100644
--- a/autoload/zvim/plug.vim
+++ b/autoload/zvim/plug.vim
@@ -1,216 +1,218 @@
 let s:save_cpo = &cpo
 set cpo&vim
 function! s:install_manager() abort
-    " Fsep && Psep
-    if has('win16') || has('win32') || has('win64')
-        let s:Psep = ';'
-        let s:Fsep = '\'
+  " Fsep && Psep
+  if has('win16') || has('win32') || has('win64')
+    let s:Psep = ';'
+    let s:Fsep = '\'
+  else
+    let s:Psep = ':'
+    let s:Fsep = '/'
+  endif
+  " auto install plugin manager
+  if g:spacevim_plugin_manager ==# 'neobundle'
+    "auto install neobundle
+    if filereadable(expand(g:spacevim_plugin_bundle_dir)
+          \ . 'neobundle.vim'. s:Fsep. 'README.md')
+      let g:_spacevim_neobundle_installed = 1
     else
-        let s:Psep = ':'
-        let s:Fsep = '/'
+      if executable('git')
+        exec '!git clone '
+              \ .'https://github.com/'
+              \ .'Shougo/neobundle.vim'
+              \ . ' '
+              \ . fnameescape(g:spacevim_plugin_bundle_dir)
+              \ . 'neobundle.vim'
+        let g:_spacevim_neobundle_installed = 1
+      else
+        echohl WarningMsg
+        echom 'You need install git!'
+        echohl None
+      endif
     endif
-    " auto install plugin manager
-    if g:spacevim_plugin_manager ==# 'neobundle'
-        "auto install neobundle
-        if filereadable(expand(g:spacevim_plugin_bundle_dir)
-                    \ . 'neobundle.vim'. s:Fsep. 'README.md')
-            let g:_spacevim_neobundle_installed = 1
-        else
-            if executable('git')
-                exec '!git clone '
-                            \ .'https://github.com/'
-                            \ .'Shougo/neobundle.vim'
-                            \ . ' '
-                            \ . fnameescape(g:spacevim_plugin_bundle_dir)
-                            \ . 'neobundle.vim'
-                let g:_spacevim_neobundle_installed = 1
-            else
-                echohl WarningMsg
-                echom 'You need install git!'
-                echohl None
-            endif
-        endif
-        exec 'set runtimepath+='
-                    \ . fnameescape(g:spacevim_plugin_bundle_dir)
-                    \ . 'neobundle.vim'
-    elseif g:spacevim_plugin_manager ==# 'dein'
-        "auto install dein
-        if filereadable(expand(g:spacevim_plugin_bundle_dir)
-                    \ . join(['repos', 'github.com',
-                    \ 'Shougo', 'dein.vim', 'README.md'],
-                    \ s:Fsep))
-            let g:_spacevim_dein_installed = 1
-        else
-            if executable('git')
-                exec '!git clone https://github.com/Shougo/dein.vim "'
-                            \ . expand(g:spacevim_plugin_bundle_dir)
-                            \ . join(['repos', 'github.com',
-                            \ 'Shougo', 'dein.vim"'], s:Fsep)
-                let g:_spacevim_dein_installed = 1
-            else
-                echohl WarningMsg
-                echom 'You need install git!'
-                echohl None
-            endif
-        endif
-        exec 'set runtimepath+='. fnameescape(g:spacevim_plugin_bundle_dir)
-                    \ . join(['repos', 'github.com', 'Shougo',
-                    \ 'dein.vim'], s:Fsep)
-    elseif g:spacevim_plugin_manager ==# 'vim-plug'
-        "auto install vim-plug
-        if filereadable(expand('~/.cache/vim-plug/autoload/plug.vim'))
-            let g:_spacevim_vim_plug_installed = 1
-        else
-            if executable('curl')
-                exec '!curl -fLo '
-                            \ . '~/.cache/vim-plug/autoload/plug.vim'
-                            \ . ' --create-dirs '
-                            \ . 'https://raw.githubusercontent.com/'
-                            \ . 'junegunn/vim-plug/master/plug.vim'
-                let g:_spacevim_vim_plug_installed = 1
-            else
-                echohl WarningMsg
-                echom 'You need install curl!'
-                echohl None
-            endif
-        endif
-        exec 'set runtimepath+=~/.cache/vim-plug/'
+    exec 'set runtimepath+='
+          \ . fnameescape(g:spacevim_plugin_bundle_dir)
+          \ . 'neobundle.vim'
+  elseif g:spacevim_plugin_manager ==# 'dein'
+    "auto install dein
+    if filereadable(expand(g:spacevim_plugin_bundle_dir)
+          \ . join(['repos', 'github.com',
+          \ 'Shougo', 'dein.vim', 'README.md'],
+          \ s:Fsep))
+      let g:_spacevim_dein_installed = 1
+    else
+      if executable('git')
+        exec '!git clone https://github.com/Shougo/dein.vim "'
+              \ . expand(g:spacevim_plugin_bundle_dir)
+              \ . join(['repos', 'github.com',
+              \ 'Shougo', 'dein.vim"'], s:Fsep)
+        let g:_spacevim_dein_installed = 1
+      else
+        echohl WarningMsg
+        echom 'You need install git!'
+        echohl None
+      endif
     endif
+    exec 'set runtimepath+='. fnameescape(g:spacevim_plugin_bundle_dir)
+          \ . join(['repos', 'github.com', 'Shougo',
+          \ 'dein.vim'], s:Fsep)
+  elseif g:spacevim_plugin_manager ==# 'vim-plug'
+    "auto install vim-plug
+    if filereadable(expand('~/.cache/vim-plug/autoload/plug.vim'))
+      let g:_spacevim_vim_plug_installed = 1
+    else
+      if executable('curl')
+        exec '!curl -fLo '
+              \ . '~/.cache/vim-plug/autoload/plug.vim'
+              \ . ' --create-dirs '
+              \ . 'https://raw.githubusercontent.com/'
+              \ . 'junegunn/vim-plug/master/plug.vim'
+        let g:_spacevim_vim_plug_installed = 1
+      else
+        echohl WarningMsg
+        echom 'You need install curl!'
+        echohl None
+      endif
+    endif
+    exec 'set runtimepath+=~/.cache/vim-plug/'
+  endif
 endf
 
 if get(g:,'spacevim_enable_plugins', 1)
-    call s:install_manager()
+  call s:install_manager()
 endif
 
 function! zvim#plug#begin(path) abort
-    let g:unite_source_menu_menus.AddedPlugins =
-                \ {'description':
-                \ 'All the Added plugins'
-                \ . '                    <leader>lp'}
-    let g:unite_source_menu_menus.AddedPlugins.command_candidates = []
-    nnoremap <silent><Leader>lp :Unite -silent
-                \ -winheight=17 -start-insert menu:AddedPlugins<CR>
-    if g:spacevim_plugin_manager ==# 'neobundle'
-        call neobundle#begin(a:path)
-    elseif g:spacevim_plugin_manager ==# 'dein'
-        call dein#begin(a:path)
-    elseif g:spacevim_plugin_manager ==# 'vim-plug'
-        call plug#begin(a:path)
-    endif
+  let g:unite_source_menu_menus.AddedPlugins =
+        \ {'description':
+        \ 'All the Added plugins'
+        \ . '                    <leader>lp'}
+  let g:unite_source_menu_menus.AddedPlugins.command_candidates = []
+  nnoremap <silent><Leader>lp :Unite -silent
+        \ -winheight=17 -start-insert menu:AddedPlugins<CR>
+  if g:spacevim_plugin_manager ==# 'neobundle'
+    call neobundle#begin(a:path)
+  elseif g:spacevim_plugin_manager ==# 'dein'
+    call dein#begin(a:path)
+  elseif g:spacevim_plugin_manager ==# 'vim-plug'
+    call plug#begin(a:path)
+  endif
 endfunction
 
 function! zvim#plug#end() abort
-    if g:spacevim_plugin_manager ==# 'neobundle'
-        call neobundle#end()
-        if g:spacevim_checkinstall == 1
-            silent! let g:_spacevim_checking_flag = neobundle#exists_not_installed_bundles()
-            if g:_spacevim_checking_flag
-                augroup SpaceVimCheckInstall
-                    au!
-                    au VimEnter * SPInstall
-                augroup END
-            endif
-        endif
-    elseif g:spacevim_plugin_manager ==# 'dein'
-        call dein#end()
-        if g:spacevim_checkinstall == 1
-            silent! let g:_spacevim_checking_flag = dein#check_install()
-            if g:_spacevim_checking_flag
-                augroup SpaceVimCheckInstall
-                    au!
-                    au VimEnter * SPInstall
-                augroup END
-            endif
-        endif
-        call dein#call_hook('source')
-    elseif g:spacevim_plugin_manager ==# 'vim-plug'
-        call plug#end()
+  if g:spacevim_plugin_manager ==# 'neobundle'
+    call neobundle#end()
+    if g:spacevim_checkinstall == 1
+      silent! let g:_spacevim_checking_flag = neobundle#exists_not_installed_bundles()
+      if g:_spacevim_checking_flag
+        augroup SpaceVimCheckInstall
+          au!
+          au VimEnter * SPInstall
+        augroup END
+      endif
     endif
+  elseif g:spacevim_plugin_manager ==# 'dein'
+    call dein#end()
+    if g:spacevim_checkinstall == 1
+      silent! let g:_spacevim_checking_flag = dein#check_install()
+      if g:_spacevim_checking_flag
+        augroup SpaceVimCheckInstall
+          au!
+          au VimEnter * SPInstall
+        augroup END
+      endif
+    endif
+    call dein#call_hook('source')
+  elseif g:spacevim_plugin_manager ==# 'vim-plug'
+    call plug#end()
+  endif
 endfunction
 
 function! zvim#plug#defind_hooks(bundle) abort
-    if g:spacevim_plugin_manager ==# 'neobundle'
-        let s:hooks = neobundle#get_hooks(a:bundle)
-        func! s:hooks.on_source(bundle) abort
-            call zvim#util#source_rc('plugins/' . split(a:bundle['name'],'\.')[0] . '.vim')
-        endf
-    elseif g:spacevim_plugin_manager ==# 'dein'
-        call dein#config(g:dein#name, {
-                    \ 'hook_source' : "call zvim#util#source_rc('plugins/" . split(g:dein#name,'\.')[0] . ".vim')"
-                    \ })
-    endif
+  if g:spacevim_plugin_manager ==# 'neobundle'
+    let s:hooks = neobundle#get_hooks(a:bundle)
+    func! s:hooks.on_source(bundle) abort
+      call zvim#util#source_rc('plugins/' . split(a:bundle['name'],'\.')[0] . '.vim')
+    endf
+  elseif g:spacevim_plugin_manager ==# 'dein'
+    call dein#config(g:dein#name, {
+          \ 'hook_source' : "call zvim#util#source_rc('plugins/" . split(g:dein#name,'\.')[0] . ".vim')"
+          \ })
+  endif
 endfunction
 
 function! zvim#plug#fetch() abort
-    if g:spacevim_plugin_manager ==# 'neobundle'
-        NeoBundleFetch 'Shougo/neobundle.vim'
-    elseif g:spacevim_plugin_manager ==# 'dein'
-        call dein#add('Shougo/dein.vim')
-    endif
+  if g:spacevim_plugin_manager ==# 'neobundle'
+    NeoBundleFetch 'Shougo/neobundle.vim'
+  elseif g:spacevim_plugin_manager ==# 'dein'
+    call dein#add('Shougo/dein.vim')
+  endif
 endfunction
 
 let s:plugins = []
 
 fu! s:parser(args) abort
-    return a:args
+  return a:args
 endf
 let g:_spacevim_plugins = []
 function! zvim#plug#add(repo,...) abort
-    let g:spacevim_plugin_name = ''
-    if g:spacevim_plugin_manager ==# 'neobundle'
-        exec 'NeoBundle "'.a:repo.'"'.','.join(a:000,',')
-        let g:spacevim_plugin_name = split(a:repo, '/')[-1]
-    elseif g:spacevim_plugin_manager ==# 'dein'
-        if len(a:000) > 0
-            call dein#add(a:repo,s:parser(a:000[0]))
-        else
-            call dein#add(a:repo)
-        endif
-        let g:spacevim_plugin_name = g:dein#name
-        call add(g:_spacevim_plugins, g:dein#name)
-    elseif g:spacevim_plugin_manager ==# 'vim-plug'
-        if len(a:000) > 0
-            exec "Plug '".a:repo."', ".join(a:000,',')
-        else
-            exec "Plug '".a:repo."'"
-        endif
-        let g:spacevim_plugin_name = split(a:repo, '/')[-1]
+  let g:spacevim_plugin_name = ''
+  if g:spacevim_plugin_manager ==# 'neobundle'
+    exec 'NeoBundle "'.a:repo.'"'.','.join(a:000,',')
+    let g:spacevim_plugin_name = split(a:repo, '/')[-1]
+  elseif g:spacevim_plugin_manager ==# 'dein'
+    if len(a:000) > 0
+      call dein#add(a:repo,s:parser(a:000[0]))
+    else
+      call dein#add(a:repo)
     endif
-    let str = get(g:,'_spacevim_plugin_layer', 'custom plugin')
-    let str = '[' . str . ']'
-    let str = str . repeat(' ', 25 - len(str))
-    exec 'call add(g:unite_source_menu_menus'
-                \ . '.AddedPlugins.command_candidates, ["'. str . '['
-                \ . a:repo
-                \ . (len(a:000) > 0 ? (']'
-                \ . repeat(' ', 40 - len(a:repo))
-                \ . '[lazy loaded]  [' . string(a:000[0])) : '')
-                \ . ']","OpenBrowser https://github.com/'
-                \ . a:repo
-                \ . '"])'
-    call add(s:plugins, a:repo)
+    let g:spacevim_plugin_name = g:dein#name
+    call add(g:_spacevim_plugins, g:dein#name)
+  elseif g:spacevim_plugin_manager ==# 'vim-plug'
+    if len(a:000) > 0
+      exec "Plug '".a:repo."', ".join(a:000,',')
+    else
+      exec "Plug '".a:repo."'"
+    endif
+    let g:spacevim_plugin_name = split(a:repo, '/')[-1]
+  endif
+  let str = get(g:,'_spacevim_plugin_layer', 'custom plugin')
+  let str = '[' . str . ']'
+  let str = str . repeat(' ', 25 - len(str))
+  exec 'call add(g:unite_source_menu_menus'
+        \ . '.AddedPlugins.command_candidates, ["'. str . '['
+        \ . a:repo
+        \ . (len(a:000) > 0 ? (']'
+        \ . repeat(' ', 40 - len(a:repo))
+        \ . '[lazy loaded]  [' . string(a:000[0])) : '')
+        \ . ']","OpenBrowser https://github.com/'
+        \ . a:repo
+        \ . '"])'
+  call add(s:plugins, a:repo)
 endfunction
 
 function! zvim#plug#tap(plugin) abort
-    if g:spacevim_plugin_manager ==# 'neobundle'
-        return neobundle#tap(a:plugin)
-    elseif g:spacevim_plugin_manager ==# 'dein'
-        return dein#tap(a:plugin)
-    endif
+  if g:spacevim_plugin_manager ==# 'neobundle'
+    return neobundle#tap(a:plugin)
+  elseif g:spacevim_plugin_manager ==# 'dein'
+    return dein#tap(a:plugin)
+  endif
 endfunction
 
 function! zvim#plug#enable_plug() abort
-    return g:_spacevim_neobundle_installed
-                \ || g:_spacevim_dein_installed
-                \ || g:_spacevim_vim_plug_installed
+  return g:_spacevim_neobundle_installed
+        \ || g:_spacevim_dein_installed
+        \ || g:_spacevim_vim_plug_installed
 endfunction
 
 function! zvim#plug#loadPluginBefore(plugin) abort
-    if matchend(a:plugin, '.vim') == len(a:plugin)
-        call zvim#util#source_rc('plugins_before/' . a:plugin)
-    else
-        call zvim#util#source_rc('plugins_before/' . a:plugin . '.vim')
-    endif
+  if matchend(a:plugin, "\\.vim") == len(a:plugin)
+    call zvim#util#source_rc('plugins_before/' . a:plugin)
+  elseif matchend(a:plugin, "\\.nvim") == len(a:plugin)
+    call zvim#util#source_rc('plugins_before/' . a:plugin[:-6] . '.vim')
+  else
+    call zvim#util#source_rc('plugins_before/' . a:plugin . '.vim')
+  endif
 endfunction
 
 let &cpo = s:save_cpo
diff --git a/config/plugins/defx.vim b/config/plugins/defx.vim
new file mode 100644
index 000000000..4bbfa42b6
--- /dev/null
+++ b/config/plugins/defx.vim
@@ -0,0 +1,145 @@
+"=============================================================================
+" defx.vim --- defx config
+" Copyright (c) 2016-2017 Wang Shidong & Contributors
+" Author: Wang Shidong < wsdjeg at 163.com >
+" URL: https://spacevim.org
+" License: GPLv3
+"=============================================================================
+
+" defx supported is added in https://github.com/SpaceVim/SpaceVim/pull/2282
+
+let s:SYS = SpaceVim#api#import('system')
+
+call defx#custom#option('_', {
+      \ 'winwidth': g:spacevim_sidebar_width,
+      \ 'split': 'vertical',
+      \ 'direction': 'botright',
+      \ 'show_ignored_files': 0,
+      \ 'buffer_name': '',
+      \ 'toggle': 1,
+      \ 'resume': 1
+      \ })
+
+call defx#custom#column('mark', {
+      \ 'readonly_icon': '',
+      \ 'selected_icon': '',
+      \ })
+
+call defx#custom#column('filename', {
+      \ 'directory_icon': '',
+      \ 'opened_icon': '',
+      \ })
+
+augroup vfinit
+  au!
+  autocmd FileType defx call s:defx_init()
+  " auto close last defx windows
+  " autocmd BufEnter * nested if (!has('vim_starting')
+  " \ && winnr('$') == 1 && &filetype ==# 'vimfiler') |
+  " \ q | endif
+augroup END
+
+function! s:defx_init()
+  setl nonumber
+  setl norelativenumber
+  setl listchars=
+
+  silent! nunmap <buffer> <Space>
+  silent! nunmap <buffer> <C-l>
+  silent! nunmap <buffer> <C-j>
+  silent! nunmap <buffer> E
+  silent! nunmap <buffer> gr
+  silent! nunmap <buffer> gf
+  silent! nunmap <buffer> -
+  silent! nunmap <buffer> s
+
+  " nnoremap <silent><buffer><expr> st  vimfiler#do_action('tabswitch')
+  " nnoremap <silent><buffer> yY  :<C-u>call <SID>copy_to_system_clipboard()<CR>
+  nnoremap <silent><buffer><expr> '
+        \ defx#do_action('toggle_select') . 'j'
+  " TODO: we need an action to clear all selections
+  nnoremap <silent><buffer><expr> V
+        \ defx#do_action('toggle_select_all')
+  " nmap <buffer> v       <Plug>(vimfiler_quick_look)
+  " nmap <buffer> p       <Plug>(vimfiler_preview_file)
+  " nmap <buffer> i       <Plug>(vimfiler_switch_to_history_directory)
+
+  " Define mappings
+  nnoremap <silent><buffer><expr> gx
+        \ defx#do_action('execute_system')
+  nnoremap <silent><buffer><expr> yy
+        \ defx#do_action('copy')
+  nnoremap <silent><buffer><expr> q
+        \ defx#do_action('quit')
+  nnoremap <silent><buffer><expr> m
+        \ defx#do_action('move')
+  nnoremap <silent><buffer><expr> P
+        \ defx#do_action('paste')
+  nnoremap <silent><buffer><expr> h defx#do_action('call', 'DefxSmartH')
+  nnoremap <silent><buffer><expr> <Left> defx#do_action('call', 'DefxSmartH')
+  nnoremap <silent><buffer><expr> l
+        \ defx#is_directory() ?
+        \ defx#do_action('open_tree') . 'j' : defx#do_action('open')
+  nnoremap <silent><buffer><expr> <Right>
+        \ defx#is_directory() ?
+        \ defx#do_action('open_tree') . 'j' : defx#do_action('open')
+  nnoremap <silent><buffer><expr> <Cr>
+        \ defx#is_directory() ?
+        \ defx#do_action('open_directory') : defx#do_action('drop')
+  nnoremap <silent><buffer><expr> <2-LeftMouse>
+        \ defx#is_directory() ?
+        \ defx#do_action('open_tree') : defx#do_action('drop')
+  nnoremap <silent><buffer><expr> sg
+        \ defx#do_action('drop', 'vsplit')
+  nnoremap <silent><buffer><expr> sv
+        \ defx#do_action('drop', 'split')
+  nnoremap <silent><buffer><expr> p
+        \ defx#do_action('open', 'pedit')
+  nnoremap <silent><buffer><expr> N
+        \ defx#do_action('new_file')
+  nnoremap <silent><buffer><expr> d
+        \ defx#do_action('remove')
+  nnoremap <silent><buffer><expr> r
+        \ defx#do_action('rename')
+  nnoremap <silent><buffer><expr> yy
+        \ defx#do_action('yank_path')
+  nnoremap <silent><buffer><expr> .
+        \ defx#do_action('toggle_ignored_files')
+  nnoremap <silent><buffer><expr> ~
+        \ defx#do_action('cd')
+  nnoremap <silent><buffer><expr> j
+        \ line('.') == line('$') ? 'gg' : 'j'
+  nnoremap <silent><buffer><expr> k
+        \ line('.') == 1 ? 'G' : 'k'
+  nnoremap <silent><buffer><expr> <C-r>
+        \ defx#do_action('redraw')
+  nnoremap <silent><buffer><expr> <C-g>
+        \ defx#do_action('print')
+  nnoremap <silent><buffer><expr> cd
+        \ defx#do_action('change_vim_cwd')
+endf
+
+function! DefxSmartH(_)
+  " candidate is opend tree?
+  if defx#is_opened_tree()
+    return defx#call_action('close_tree')
+  endif
+  
+  " parent is root?
+  let s:candidate = defx#get_candidate()
+  let s:parent = fnamemodify(s:candidate['action__path'], s:candidate['is_directory'] ? ':p:h:h' : ':p:h')
+  let sep = s:SYS.isWindows ? '\\' :  '/'
+  if s:trim_right(s:parent, sep) == s:trim_right(b:defx.paths[0], sep)
+    return defx#call_action('cd', ['..'])
+  endif
+  
+  " move to parent.
+  call defx#call_action('search', s:parent)
+  
+  " if you want close_tree immediately, enable below line.
+  call defx#call_action('close_tree')
+endfunction
+
+function! s:trim_right(str, trim)
+  return substitute(a:str, printf('%s$', a:trim), '', 'g')
+endfunction
diff --git a/config/plugins_before/defx.vim b/config/plugins_before/defx.vim
new file mode 100644
index 000000000..60eaf2269
--- /dev/null
+++ b/config/plugins_before/defx.vim
@@ -0,0 +1,2 @@
+nnoremap <silent> <F3> :Defx<Cr>
+
diff --git a/doc/SpaceVim.txt b/doc/SpaceVim.txt
index cdd2baf11..547815f16 100644
--- a/doc/SpaceVim.txt
+++ b/doc/SpaceVim.txt
@@ -566,7 +566,8 @@ plugins will be installed.
 <
 
                                                       *g:spacevim_filemanager*
-The default file manager of SpaceVim. Default is 'vimfiler'.
+The default file manager of SpaceVim. Default is 'vimfiler'. you can also use
+nerdtree or defx
 
                                          *g:spacevim_plugin_manager_processes*
 Set the max process of SpaceVim plugin manager
diff --git a/docs/layers/lang/markdown.md b/docs/layers/lang/markdown.md
index d5d8fbb67..f5701bd62 100644
--- a/docs/layers/lang/markdown.md
+++ b/docs/layers/lang/markdown.md
@@ -33,6 +33,7 @@ To use this configuration layer, update custom configuration file with:
 SpaceVim uses remark to format Markdown file by default, but we suggest using [Prettier](https://github.com/prettier/prettier) on Windows.
 
 You can install remark via [npm](https://www.npmjs.com/get-npm), the commands are shown as below.
+
 ```sh
 npm -g install remark
 npm -g install remark-cli
@@ -42,10 +43,13 @@ npm -g install remark-stringify
 You can install [Prettier](https://github.com/prettier/prettier) via [yarn](https://yarnpkg.com/lang/zh-hans/docs/install/#windows-stable) or [npm](https://www.npmjs.com/get-npm), the commands are shown as below:
 
 1. Via `yarn`
+
 ```sh
 yarn global add prettier
 ```
+
 2. Via `npm`
+
 ```sh
 npm install --global prettier
 ```