diff --git a/autoload/SpaceVim/api/vim/compatible.vim b/autoload/SpaceVim/api/vim/compatible.vim
index 7b6e3bb55..72978430c 100644
--- a/autoload/SpaceVim/api/vim/compatible.vim
+++ b/autoload/SpaceVim/api/vim/compatible.vim
@@ -193,7 +193,7 @@ if has('patch-7.4.279')
   endfunction
 else
   function! s:self.globpath(dir, expr) abort
-    return split(globpath(a:dir, a:expr), '\n')
+    return split(globpath(a:dir, a:expr), "\n")
   endfunction
 endif
 
diff --git a/docs/api/file.md b/docs/api/file.md
index 95fd3ca20..8b541b07e 100644
--- a/docs/api/file.md
+++ b/docs/api/file.md
@@ -10,6 +10,7 @@ description: "file API provides some basic functions and values for current os."
 
 - [values](#values)
 - [functions](#functions)
+- [Usage](#usage)
 
 <!-- vim-markdown-toc -->
 
@@ -30,3 +31,21 @@ description: "file API provides some basic functions and values for current os."
 | `read(file)`              | read message from file                          |
 | `ls(dir, if_file_only)`   | list files and directorys in specific directory |
 | `updateFiles(files)`      | update the contents of all files                |
+
+## Usage
+
+This api can be used in both vim script and lua script.
+
+**vim script:**
+
+```vim
+let s:FILE = SpaceVim#api#import('file')
+echom S:FILE.separator
+```
+
+**lua script:**
+
+```lua
+local file_api = require('spacevim.api').import('file')
+print(file_api.separator)
+```
diff --git a/lua/spacevim.lua b/lua/spacevim.lua
index a1e74575e..070cda58b 100644
--- a/lua/spacevim.lua
+++ b/lua/spacevim.lua
@@ -23,6 +23,21 @@ end
 
 -- there is no want to call viml function in old vim and neovim
 
+local function build_argv(...)
+    local str = ''
+    for index, value in ipairs(...) do
+        if str ~= '' then
+            str = str .. ','
+        end
+        if type(value) == 'string' then
+            str = str .. '"' .. value .. '"'
+        elseif type(value) == 'number' then
+            str = str .. value
+        end
+    end
+    return str
+end
+
 function M.call(funcname, ...)
     if vim.call ~= nil then
         return vim.call(funcname, ...)
@@ -30,6 +45,9 @@ function M.call(funcname, ...)
         if vim.api ~= nil then
             return vim.api.nvim_call_function(funcname, {...})
         else
+            -- call not call vim script function in lua
+            vim.command('let g:lua_rst = ' .. funcname .. '(' .. build_argv({...}) .. ')')
+            return M.eval('g:lua_rst')
         end
     end
 end
diff --git a/lua/spacevim/api.lua b/lua/spacevim/api.lua
index c046670bb..3668137d7 100644
--- a/lua/spacevim/api.lua
+++ b/lua/spacevim/api.lua
@@ -1,6 +1,4 @@
 local api = {}
-
-
 function api.import(name)
  return require('spacevim.api.' .. name)   
 end
diff --git a/lua/spacevim/api/file.lua b/lua/spacevim/api/file.lua
new file mode 100644
index 000000000..3eb46c926
--- /dev/null
+++ b/lua/spacevim/api/file.lua
@@ -0,0 +1,276 @@
+local M = {}
+
+local system = require('spacevim.api').import('system')
+local fn = nil
+
+if vim.fn == nil then
+    fn = require('spacevim').fn
+else
+    fn = vim.fn
+end
+
+if system.isWindows then
+    M.separator = '\\'
+    M.pathSeparator = ';'
+else
+    M.separator = '/'
+    M.pathSeparator = ':'
+end
+
+local file_node_extensions = {
+    ['styl'] = '',
+    ['scss'] = '',
+    ['htm'] = '',
+    ['html'] = '',
+    ['erb'] = '',
+    ['slim'] = '',
+    ['ejs'] = '',
+    ['wxml'] = '',
+    ['css'] = '',
+    ['less'] = '',
+    ['wxss'] = '',
+    ['md'] = '',
+    ['markdown'] = '',
+    ['json'] = '',
+    ['js'] = '',
+    ['jsx'] = '',
+    ['rb'] = '',
+    ['php'] = '',
+    ['py'] = '',
+    ['pyc'] = '',
+    ['pyo'] = '',
+    ['pyd'] = '',
+    ['coffee'] = '',
+    ['mustache'] = '',
+    ['hbs'] = '',
+    ['conf'] = '',
+    ['ini'] = '',
+    ['yml'] = '',
+    ['bat'] = '',
+    ['jpg'] = '',
+    ['jpeg'] = '',
+    ['bmp'] = '',
+    ['png'] = '',
+    ['gif'] = '',
+    ['ico'] = '',
+    ['twig'] = '',
+    ['cpp'] = '',
+    ['c++'] = '',
+    ['cxx'] = '',
+    ['cc'] = '',
+    ['cp'] = '',
+    ['c'] = '',
+    ['hs'] = '',
+    ['lhs'] = '',
+    ['lua'] = '',
+    ['java'] = '',
+    ['sh'] = '',
+    ['fish'] = '',
+    ['ml'] = 'λ',
+    ['mli'] = 'λ',
+    ['diff'] = '',
+    ['db'] = '',
+    ['sql'] = '',
+    ['dump'] = '',
+    ['clj'] = '',
+    ['cljc'] = '',
+    ['cljs'] = '',
+    ['edn'] = '',
+    ['scala'] = '',
+    ['go'] = '',
+    ['dart'] = '',
+    ['xul'] = '',
+    ['sln'] = '',
+    ['suo'] = '',
+    ['pl'] = '',
+    ['pm'] = '',
+    ['t'] = '',
+    ['rss'] = '',
+    ['f#'] = '',
+    ['fsscript'] = '',
+    ['fsx'] = '',
+    ['fs'] = '',
+    ['fsi'] = '',
+    ['rs'] = '',
+    ['rlib'] = '',
+    ['d'] = '',
+    ['erl'] = '',
+    ['hrl'] = '',
+    ['vim'] = '',
+    ['ai'] = '',
+    ['psd'] = '',
+    ['psb'] = '',
+    ['ts'] = '',
+    ['tsx'] = '',
+    ['jl'] = '',
+    ['ex'] = '',
+    ['exs'] = '',
+    ['eex'] = '',
+    ['leex'] = ''
+}
+
+local file_node_exact_matches = {
+    ['exact-match-case-sensitive-1.txt']  = 'X1',
+    ['exact-match-case-sensitive-2']      = 'X2',
+    ['gruntfile.coffee']                  = '',
+    ['gruntfile.js']                      = '',
+    ['gruntfile.ls']                      = '',
+    ['gulpfile.coffee']                   = '',
+    ['gulpfile.js']                       = '',
+    ['gulpfile.ls']                       = '',
+    ['dropbox']                           = '',
+    ['.ds_store']                         = '',
+    ['.gitconfig']                        = '',
+    ['.gitignore']                        = '',
+    ['.bashrc']                           = '',
+    ['.bashprofile']                      = '',
+    ['favicon.ico']                       = '',
+    ['license']                           = '',
+    ['node_modules']                      = '',
+    ['react.jsx']                         = '',
+    ['Procfile']                          = '',
+    ['.vimrc']                            = '',
+    ['mix.lock']                          = '',
+}
+
+local file_node_pattern_matches = {
+    ['.*jquery.*\\.js$']       = '',
+    ['.*angular.*\\.js$']      = '',
+    ['.*backbone.*\\.js$']     = '',
+    ['.*require.*\\.js$']      = '',
+    ['.*materialize.*\\.js$']  = '',
+    ['.*materialize.*\\.css$'] = '',
+    ['.*mootools.*\\.js$']     = ''
+}
+
+function M.fticon(path)
+    local file = fn.fnamemodify(path, ':t')
+    if file_node_exact_matches[file] ~= nil then
+        return file_node_exact_matches[file]
+    end
+    for k,v in ipairs(file_node_pattern_matches) do
+        if fn.match(file, k) ~= -1 then
+            return v
+        end
+    end
+    local ext = fn.fnamemodify(file, ':e')
+    if file_node_extensions[ext] ~= nil then
+        return file_node_extensions[ext]
+    else
+        return ''
+    end
+end
+
+function M.read(path)
+  if fn.filereadable(path) then
+    return fn.readfile(path, '')
+  else
+    return ''
+  end
+end
+
+function M.write(msg, fname)
+    local flags
+    if fn.filereadable(fname) == 1 then
+        flags = 'a'
+    else
+        flags = ''
+    end
+    fn.writefile({msg}, fname, flags)
+end
+
+function M.override(msg, fname)
+    local flags
+    if fn.filereadable(fname) == 1 then
+        flags = 'b'
+    else
+        flags = ''
+    end
+    fn.writefile({msg}, fname, flags)
+end
+
+function M.read(fname)
+    if fn.filereadable(fname) == 1 then
+        return fn.readfile(fname, '')
+    else
+        return ''
+    end
+end
+
+function M.unify_path(_path, ...)
+  local mod = select('1', ...)
+  if mod == nil then
+      mod = ':p'
+  end
+  local path = fn.fnamemodify(_path, mod .. ':gs?[\\\\/]?/?')
+  if fn.isdirectory(path) == 1 and string.sub(path, -1) ~= '/' then
+    return path .. '/'
+  elseif string.sub(_path, -1) == '/' and string.sub(path, -1) ~= '/' then
+    return path .. '/'
+  else
+    return path
+  end
+end
+
+function M.path_to_fname(path)
+    return fn.substitute(M.unify_path(path), '[\\/:;.]', '_', 'g')
+end
+
+
+
+function M.findfile(what, where, ...)
+  -- let old_suffixesadd = &suffixesadd
+  -- let &suffixesadd = ''
+  local count = select('1', ...)
+  if count == nil then
+      count = 0
+  end
+
+  local file = ''
+
+  if fn.filereadable(where) == 1 and  fn.isdirectory(where) == 0 then
+    path = fn.fnamemodify(where, ':h')
+  else
+    path = where
+  end
+  if count > 0 then
+    file = fn.findfile(what, fn.escape(path, ' ') .. ';', count)
+  elseif #{...} == 0 then
+    file = fn.findfile(what, fn.escape(path, ' ') .. ';')
+  elseif count == 0 then
+    file = fn.findfile(what, fn.escape(path, ' ') .. ';', -1)
+  else
+    file = fn.get(fn.findfile(what, fn.escape(path, ' ') .. ';', -1), count, '')
+  end
+  -- let &suffixesadd = old_suffixesadd
+  return file
+end
+
+function M.finddir(what, where, ...)
+  -- let old_suffixesadd = &suffixesadd
+  -- let &suffixesadd = ''
+  local count = select('1', ...)
+  if count == nil then
+      count = 0
+  end
+  local path = ''
+  local file = ''
+  if fn.filereadable(where) == 1 and fn.isdirectory(where) == 0 then
+    path = fn.fnamemodify(where, ':h')
+  else
+    path = where
+  end
+  if count > 0 then
+    file = fn.finddir(what, fn.escape(path, ' ') .. ';', count)
+  elseif #{...} == 0 then
+    file = fn.finddir(what, fn.escape(path, ' ') .. ';')
+  elseif count == 0 then
+    file = fn.finddir(what, fn.escape(path, ' ') .. ';', -1)
+  else
+    file = fn.get(fn.finddir(what, fn.escape(path, ' ') .. ';', -1), count, '')
+  end
+  -- let &suffixesadd = old_suffixesadd
+  return file
+end
+
+return M
diff --git a/lua/spacevim/api/vim/compatible.lua b/lua/spacevim/api/vim/compatible.lua
new file mode 100644
index 000000000..a4001c90e
--- /dev/null
+++ b/lua/spacevim/api/vim/compatible.lua
@@ -0,0 +1,41 @@
+local M = {}
+
+local system = require('spacevim.api').import('system')
+local fn = nil
+local has = nil
+
+if vim.fn == nil then
+    fn = require('spacevim').fn
+else
+    fn = vim.fn
+end
+
+if vim.api == nil then
+    has = require('spacevim').has
+else
+    if vim.fn ~= nil then
+        has = vim.fn.has
+    else
+        has = require('spacevim').has
+    end
+end
+
+local has_cache = {}
+
+function M.has(feature)
+    if has_cache[feature] ~= nil then
+        return has_cache[feature]
+    end
+end
+
+if has('patch-7.4.279') then
+    function M.globpath(dir, expr)
+        return fn.globpath(dir, expr, 1, 1)
+    end
+else
+    function M.globpath(dir, expr)
+        return fn.split(fn.globpath(dir, expr), "\n")
+    end
+end
+
+return M
diff --git a/test/api/file.vader b/test/api/file.vader
index 6ba7f94ff..38795add2 100644
--- a/test/api/file.vader
+++ b/test/api/file.vader
@@ -1,5 +1,4 @@
 Execute ( SpaceVim api: file.fticon ):
-  let &encoding = 'utf-8'
   let g:spacevim_filetype_icons = {}
   let file = SpaceVim#api#import('file')
   AssertEqual file.fticon('foo.md'), ''
diff --git a/test/lua/api/file.vader b/test/lua/api/file.vader
new file mode 100644
index 000000000..0867bf366
--- /dev/null
+++ b/test/lua/api/file.vader
@@ -0,0 +1,35 @@
+Execute ( SpaceVim lua api: file.fticon(ft) ):
+  let file = SpaceVim#api#import('file')
+  let cmp = SpaceVim#api#import('vim#compatible')
+  lua spacevim_file = require('spacevim.api').import('file')
+  AssertEqual cmp.luaeval('spacevim_file.fticon("foo.md")'), file.fticon('foo.md')
+  AssertEqual cmp.luaeval('spacevim_file.fticon("foo.mdxx")'), file.fticon('foo.mdxx')
+
+Execute ( SpaceVim lua api: file.unify_path(path, ...) ):
+  let file = SpaceVim#api#import('file')
+  let cmp = SpaceVim#api#import('vim#compatible')
+  lua spacevim_file = require('spacevim.api').import('file')
+  AssertEqual cmp.luaeval('spacevim_file.unify_path(".SpaceVim.d/init.vim", ":p")'),
+  \ file.unify_path(".SpaceVim.d/init.vim", ":p")
+  AssertEqual cmp.luaeval('spacevim_file.unify_path("~/.SpaceVim.d/", ":p")'),
+  \ file.unify_path("~/.SpaceVim.d/", ":p")
+  AssertEqual cmp.luaeval('spacevim_file.unify_path("autoload", ":p")'),
+  \ file.unify_path("autoload", ":p")
+
+Execute ( SpaceVim lua api: file.path_to_fname(path) ):
+  let file = SpaceVim#api#import('file')
+  let cmp = SpaceVim#api#import('vim#compatible')
+  lua spacevim_file = require('spacevim.api').import('file')
+  AssertEqual cmp.luaeval('spacevim_file.path_to_fname(".SpaceVim.d/init.vim")'),
+  \ file.path_to_fname('.SpaceVim.d/init.vim')
+
+Execute ( SpaceVim lua api: file.findfile(what, where, ...) ):
+  let file = SpaceVim#api#import('file')
+  let cmp = SpaceVim#api#import('vim#compatible')
+  lua spacevim_file = require('spacevim.api').import('file')
+  lua if vim.fn == nil then fn = require('spacevim').fn else fn = vim.fn end
+  AssertEqual cmp.luaeval('spacevim_file.finddir("doc/", fn.fnamemodify("bundle/dein.vim/autoload/dein.vim", ":p:."))'),
+  \ file.finddir("doc/", fnamemodify("bundle/dein.vim/autoload/dein.vim", ":p:."))
+  AssertEqual cmp.luaeval('spacevim_file.unify_path(spacevim_file.findfile("vimrc", "bundle/dein.vim/autoload/dein.vim"), ":.")'),
+  \ file.unify_path(file.findfile("vimrc", "bundle/dein.vim/autoload/dein.vim"), ":.")
+  lua spacevim_file = nil