diff --git a/autoload/SpaceVim.vim b/autoload/SpaceVim.vim
index 498a8a628..723c7f48f 100644
--- a/autoload/SpaceVim.vim
+++ b/autoload/SpaceVim.vim
@@ -66,7 +66,7 @@ let g:spacevim_vim_plug_installed      = 0
 " >
 "   let g:spacevim_plugin_bundle_dir = '~/.cache/vimplugs'
 " <
-let g:spacevim_plugin_bundle_dir       = $HOME. join(['', '.cache', 'vimfiles', ''], '/')
+let g:spacevim_plugin_bundle_dir       = $HOME. join(['', '.cache', 'vimfiles', ''], SpaceVim#api#import('file').separator)
 ""
 " Disable/Enable realtime leader guide, by default it is 0.
 " to enable this feature:
diff --git a/autoload/SpaceVim/api.vim b/autoload/SpaceVim/api.vim
new file mode 100644
index 000000000..f912ca5e4
--- /dev/null
+++ b/autoload/SpaceVim/api.vim
@@ -0,0 +1,8 @@
+function! SpaceVim#api#import(name) abort
+    let p = {}
+    try
+        let p = SpaceVim#api#{a:name}#get()
+    catch /^Vim\%((\a\+)\)\=:E117/
+    endtry
+    return p
+endfunction
diff --git a/autoload/SpaceVim/api/file.vim b/autoload/SpaceVim/api/file.vim
new file mode 100644
index 000000000..3660c60ac
--- /dev/null
+++ b/autoload/SpaceVim/api/file.vim
@@ -0,0 +1,15 @@
+let s:file = {}
+let s:system = SpaceVim#api#import('system')
+
+if s:system.isWindows
+    let s:file['separator'] = '\'
+else
+    let s:file['separator'] = '/'
+endif
+
+function! SpaceVim#api#file#get() abort
+    return deepcopy(s:file)
+endfunction
+
+
+
diff --git a/autoload/SpaceVim/api/system.vim b/autoload/SpaceVim/api/system.vim
new file mode 100644
index 000000000..ec767f308
--- /dev/null
+++ b/autoload/SpaceVim/api/system.vim
@@ -0,0 +1,12 @@
+let s:system = {}
+
+let s:system['isWindows'] = has('win16') || has('win32') || has('win64')
+
+let s:system['isLinux'] = has('unix') && !has('macunix') && !has('win32unix')
+
+let s:system['isOSX'] = has('macunix')
+
+
+function! SpaceVim#api#system#get() abort
+    return deepcopy(s:system)
+endfunction
diff --git a/autoload/zvim/plug.vim b/autoload/zvim/plug.vim
index c5916e479..bc05cfe16 100644
--- a/autoload/zvim/plug.vim
+++ b/autoload/zvim/plug.vim
@@ -1,6 +1,6 @@
 let s:save_cpo = &cpo
 set cpo&vim
-function! s:install_manager()
+function! s:install_manager() abort
     " Fsep && Psep
     if has('win16') || has('win32') || has('win64')
         let s:Psep = ';'
@@ -21,19 +21,19 @@ function! s:install_manager()
                             \ .'https://github.com/'
                             \ .'Shougo/neobundle.vim'
                             \ . ' '
-                            \ . g:spacevim_plugin_bundle_dir
+                            \ . fnameescape(g:spacevim_plugin_bundle_dir)
                             \ . 'neobundle.vim'
                 let g:spacevim_neobundle_installed = 1
             else
                 echohl WarningMsg
-                echom "You need install git!"
+                echom 'You need install git!'
                 echohl None
             endif
         endif
         exec 'set runtimepath+='
-                    \ . g:spacevim_plugin_bundle_dir
+                    \ . fnameescape(g:spacevim_plugin_bundle_dir)
                     \ . 'neobundle.vim'
-    elseif g:spacevim_plugin_manager == 'dein'
+    elseif g:spacevim_plugin_manager ==# 'dein'
         "auto install dein
         if filereadable(expand(g:spacevim_plugin_bundle_dir)
                     \ . join(['repos', 'github.com',
@@ -42,21 +42,21 @@ function! s:install_manager()
             let g:spacevim_dein_installed = 1
         else
             if executable('git')
-                exec '!git clone https://github.com/Shougo/dein.vim '
+                exec '!git clone https://github.com/Shougo/dein.vim "'
                             \ . g:spacevim_plugin_bundle_dir
                             \ . join(['repos', 'github.com',
-                            \ 'Shougo', 'dein.vim'], s:Fsep)
+                            \ 'Shougo', 'dein.vim"'], s:Fsep)
                 let g:spacevim_dein_installed = 1
             else
                 echohl WarningMsg
-                echom "You need install git!"
+                echom 'You need install git!'
                 echohl None
             endif
         endif
-        exec 'set runtimepath+='.g:spacevim_plugin_bundle_dir
+        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'
+    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
@@ -70,7 +70,7 @@ function! s:install_manager()
                 let g:spacevim_vim_plug_installed = 1
             else
                 echohl WarningMsg
-                echom "You need install curl!"
+                echom 'You need install curl!'
                 echohl None
             endif
         endif
@@ -90,22 +90,22 @@ function! zvim#plug#begin(path) abort
     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'
+    if g:spacevim_plugin_manager ==# 'neobundle'
         call neobundle#begin(a:path)
-    elseif g:spacevim_plugin_manager == 'dein'
+    elseif g:spacevim_plugin_manager ==# 'dein'
         call dein#begin(a:path)
-    elseif g:spacevim_plugin_manager == 'vim-plug'
+    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'
+    if g:spacevim_plugin_manager ==# 'neobundle'
         call neobundle#end()
         if g:spacevim_checkinstall == 1
             NeoBundleCheck
         endif
-    elseif g:spacevim_plugin_manager == 'dein'
+    elseif g:spacevim_plugin_manager ==# 'dein'
         call dein#end()
         if g:spacevim_checkinstall == 1
             silent! let flag = dein#check_install()
@@ -117,18 +117,18 @@ function! zvim#plug#end() abort
             endif
         endif
         call dein#call_hook('source')
-    elseif g:spacevim_plugin_manager == 'vim-plug'
+    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'
+    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'
+    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')"
                     \ })
@@ -136,32 +136,32 @@ function! zvim#plug#defind_hooks(bundle) abort
 endfunction
 
 function! zvim#plug#fetch() abort
-    if g:spacevim_plugin_manager == 'neobundle'
+    if g:spacevim_plugin_manager ==# 'neobundle'
         NeoBundleFetch 'Shougo/neobundle.vim'
-    elseif g:spacevim_plugin_manager == 'dein'
+    elseif g:spacevim_plugin_manager ==# 'dein'
         call dein#add('Shougo/dein.vim')
     endif
 endfunction
 
 let s:plugins = []
 
-fu! s:parser(args)
+fu! s:parser(args) abort
     return a:args
 endf
 
 function! zvim#plug#add(repo,...) abort
     let g:spacevim_plugin_name = ''
-    if g:spacevim_plugin_manager == 'neobundle'
+    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'
+    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
-    elseif g:spacevim_plugin_manager == 'vim-plug'
+    elseif g:spacevim_plugin_manager ==# 'vim-plug'
         if len(a:000) > 0
             exec "Plug '".a:repo."', ".join(a:000,',')
         else
@@ -185,9 +185,9 @@ function! zvim#plug#add(repo,...) abort
 endfunction
 
 function! zvim#plug#tap(plugin) abort
-    if g:spacevim_plugin_manager == 'neobundle'
+    if g:spacevim_plugin_manager ==# 'neobundle'
         return neobundle#tap(a:plugin)
-    elseif g:spacevim_plugin_manager == 'dein'
+    elseif g:spacevim_plugin_manager ==# 'dein'
         return dein#tap(a:plugin)
     endif
 endfunction
@@ -199,7 +199,7 @@ function! zvim#plug#enable_plug() abort
 endfunction
 
 function! zvim#plug#loadPluginBefore(plugin) abort
-    if matchend(a:plugin, ".vim") == len(a:plugin)
+    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')