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diff --git a/xmake/toolchains/vs/load.lua b/xmake/toolchains/vs/load.lua
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+++ b/xmake/toolchains/vs/load.lua
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+--!A cross-toolchain build utility based on Lua
+--
+-- Licensed under the Apache License, Version 2.0 (the "License");
+-- you may not use this file except in compliance with the License.
+-- You may obtain a copy of the License at
+--
+--     http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing, software
+-- distributed under the License is distributed on an "AS IS" BASIS,
+-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+-- See the License for the specific language governing permissions and
+-- limitations under the License.
+-- 
+-- Copyright (C) 2015-2020, TBOOX Open Source Group.
+--
+-- @author      ruki
+-- @file        load.lua
+--
+
+-- imports
+import("core.base.option")
+import("core.project.config")
+import("detect.sdks.find_vstudio")
+
+-- add the given vs environment
+function _add_vsenv(toolchain, name)
+
+    -- get vcvarsall
+    local vcvarsall = config.get("__vcvarsall") 
+    if not vcvarsall then
+        return 
+    end
+
+    -- get arch
+    local arch = config.get("arch") or ""
+
+    -- get vs environment for the current arch
+    local vsenv = vcvarsall[arch] or {}
+
+    -- switch vstudio environment if vs_sdkver has been changed 
+    local switch_vsenv = false
+    local vs = config.get("vs")
+    local vs_sdkver = config.get("vs_sdkver")
+    if vs and vs_sdkver and vsenv.WindowsSDKVersion and vs_sdkver ~= vsenv.WindowsSDKVersion then
+        switch_vsenv = true
+    end
+    if switch_vsenv then
+        -- find vstudio
+        local vstudio = find_vstudio({vcvars_ver = config.get("vs_toolset"), sdkver = vs_sdkver})
+        if vstudio then
+            vcvarsall = (vstudio[vs] or {}).vcvarsall or {}
+            vsenv = vcvarsall[arch] or {}
+            if vsenv and vsenv.path and vsenv.include and vsenv.lib then
+                config.set("__vcvarsall", vcvarsall)
+            end
+        end
+    end
+
+    -- get the pathes for the vs environment
+    local new = vsenv[name]
+    if new then
+        toolchain:add("runenvs", name:upper(), path.splitenv(new))
+    end
+end
+
+-- main entry
+function main(toolchain)
+
+    -- set toolsets
+    toolchain:set("toolsets", "cc",  "cl.exe")
+    toolchain:set("toolsets", "cxx", "cl.exe")
+    toolchain:set("toolsets", "mrc", "rc.exe")
+    if is_arch("x64") then
+        toolchain:set("toolsets", "as",  "ml64.exe")
+    else
+        toolchain:set("toolsets", "as",  "ml.exe")
+    end
+    toolchain:set("toolsets", "ld",  "link.exe")
+    toolchain:set("toolsets", "sh",  "link.exe -dll")
+    toolchain:set("toolsets", "ar",  "link.exe -lib")
+    toolchain:set("toolsets", "ex",  "lib.exe")
+
+    -- add vs environments
+    _add_vsenv(toolchain, "path")
+    _add_vsenv(toolchain, "lib")
+    _add_vsenv(toolchain, "include")
+    _add_vsenv(toolchain, "libpath")
+end
+