diff --git a/dtkApi/apiRequest/Request.py b/dtkApi/apiRequest/Request.py
index f7de5904c52d6dd6947222216708f647729e928b..71e2648965bb159f97b48a08a2e779e077b26a41 100644
--- a/dtkApi/apiRequest/Request.py
+++ b/dtkApi/apiRequest/Request.py
@@ -4,6 +4,9 @@ import hashlib
 import copy
 import subprocess
 import logging
+import time
+import random
+
 logging.captureWarnings(True)
 try:
     import requests
@@ -35,13 +38,12 @@ class Request():
 
     def md5_sign(self,args=None):
         copy_args =copy.deepcopy(args)
-        #对传入的参数 按照key 排序
-        sorted_args = sorted(copy_args.items(), key=operator.itemgetter(0))
-        tmp = []
-        for i in sorted_args:
-            tmp.append('{}={}'.format(list(i)[0], list(i)[1]))
-        sign = self.md5('&'.join(tmp) + '&' + 'key={}'.format(self.appSecret)).upper()
-        copy_args['sign'] = sign
+        timer = int(time.time() * 1000)
+        nonce = random.randint(100000, 999999)
+        sign = self.md5('appKey='+self.appKey+'&timer='+str(timer)+'&nonce='+str(nonce)+'&key='+self.appSecret).upper()
+        copy_args['signRan'] = sign
+        copy_args['timer'] = timer
+        copy_args['nonce'] = nonce
         return copy_args
     def check_args(self,arg,check_params):
         params=copy.deepcopy(check_params)