diff --git a/Readme.md b/Readme.md
index 931a2e6..ed7157f 100644
--- a/Readme.md
+++ b/Readme.md
@@ -58,6 +58,8 @@ crypto.rand(10, true) // 3458765234
 
 ### uuid()
 > 返回一个如下格式的 xxxxxxxx-xxxx-xxxx-xxxxxxxx 的唯一ID
+>> 1、加入机器码, 减小不同机器生成的uuid相同的机率
+>> 2、每秒可生成20万个ID(测试机器: Intel i5-8500B@3.00GHz 16G内存)
 
 ```javascript
 let crypto = require('crypto.js')
diff --git a/index.js b/index.js
index 90c40e0..6b01694 100644
--- a/index.js
+++ b/index.js
@@ -4,11 +4,20 @@
  * @date 2020/09/16 18:11:51
  */
 
+const os = require('os')
 const fs = require('fs')
 const Helper = require('./lib/helper.js')
 
-const PID = process.pid
-const PPID = process.ppid
+const MAC = (function(ns) {
+  for (let k in ns) {
+    let _ = ns[k].pop()
+    if (_.mac !== '00:00:00:00:00:00') {
+      return _.mac
+    }
+  }
+  return process.pid.toString(16) + process.ppid.toString(16)
+})(os.networkInterfaces())
+
 var __inc__ = 1024
 
 /**
@@ -74,23 +83,16 @@ Helper.rand = function(len, forceNum) {
 Helper.uuid = function(pipe = '-') {
   var rand = Helper.origin.randomBytes(8).toString('hex')
   var now = (~~(Date.now() / 1000)).toString(16)
-  var inc
+  var str
 
   __inc__++
   if (__inc__ > 65535) {
     __inc__ = 1024
   }
-
-  inc = (__inc__ + PID + PPID).toString(16).padStart(4, '0') + rand.slice(0, 4)
+  str = md5(MAC + rand + __inc__)
 
   return (
-    now +
-    pipe +
-    inc.slice(0, 4) +
-    pipe +
-    inc.slice(4, 8) +
-    pipe +
-    rand.slice(-8)
+    now + pipe + str.slice(0, 4) + pipe + str.slice(4, 8) + pipe + str.slice(-8)
   )
 }
 
diff --git a/index.mjs b/index.mjs
index 18932d9..9964160 100644
--- a/index.mjs
+++ b/index.mjs
@@ -4,11 +4,20 @@
  * @date 2020/09/16 18:11:51
  */
 
+import os from 'os'
 import fs from 'fs'
 import Helper from './lib/helper.mjs'
 
-const PID = process.pid
-const PPID = process.ppid
+const MAC = (function(ns) {
+  for (let k in ns) {
+    let _ = ns[k].pop()
+    if (_.mac !== '00:00:00:00:00:00') {
+      return _.mac
+    }
+  }
+  return process.pid.toString(16) + process.ppid.toString(16)
+})(os.networkInterfaces())
+
 var __inc__ = 1024
 
 /**
@@ -74,23 +83,16 @@ export function rand(len, forceNum) {
 export function uuid(pipe = '-') {
   var rand = Helper.origin.randomBytes(8).toString('hex')
   var now = (~~(Date.now() / 1000)).toString(16)
-  var inc
+  var str
 
   __inc__++
   if (__inc__ > 65535) {
     __inc__ = 1024
   }
-
-  inc = (__inc__ + PID + PPID).toString(16).padStart(4, '0') + rand.slice(0, 4)
+  str = md5(MAC + rand + __inc__)
 
   return (
-    now +
-    pipe +
-    inc.slice(0, 4) +
-    pipe +
-    inc.slice(4, 8) +
-    pipe +
-    rand.slice(-8)
+    now + pipe + str.slice(0, 4) + pipe + str.slice(4, 8) + pipe + str.slice(-8)
   )
 }
 
diff --git a/package.json b/package.json
index 209c459..03615a2 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "crypto.js",
-  "version": "2.0.4",
+  "version": "2.0.5",
   "description": "原生crypto加密模块的二次封装,简化常用加密函数的使用",
   "keywords": [
     "md5",