diff --git a/TencentYoutuyun/youtu.py b/TencentYoutuyun/youtu.py
index 613d84a..253d4b0 100644
--- a/TencentYoutuyun/youtu.py
+++ b/TencentYoutuyun/youtu.py
@@ -40,6 +40,7 @@ def __init__(self, appid, secret_id, secret_key, userid='0', end_point=conf.API_
         self._userid     = userid
         self._end_point  = end_point
         conf.set_app_info(appid, secret_id, secret_key, userid, end_point)
+        self.requests_session = requests.Session()
     
     def get_headers(self, req_type):
        
@@ -98,9 +99,10 @@ def FaceCompare(self, image_pathA, image_pathB, data_type = 0):
             data["urlA"] = image_pathA
             data["urlB"] = image_pathB
              
-        r = {}
         try:
-            r = requests.post(url, headers=headers, data = json.dumps(data))
+            req = requests.Request('POST',  url, data=json.dumps(data), headers=headers)
+            prepped = self.requests_session.prepare_request(req)
+            r = self.requests_session.send(prepped)
             if r.status_code != 200:
                 return {'httpcode':r.status_code, 'errorcode':self.IMAGE_NETWORK_ERROR, 'errormsg':'', 'session_id':'', 'similarity':0}
             ret = r.json()
@@ -135,9 +137,10 @@ def FaceVerify(self, person_id, image_path, data_type = 0):
         else :
             data["url"] = image_path
         
-        r = {}
         try:
-            r = requests.post(url, headers=headers, data = json.dumps(data))
+            req = requests.Request('POST',  url, data=json.dumps(data), headers=headers)
+            prepped = self.requests_session.prepare_request(req)
+            r = self.requests_session.send(prepped)
             if r.status_code != 200:  
                 return {'httpcode':r.status_code, 'errorcode':'', 'errormsg':'', "confidence":0, "ismatch":0, "session_id":''}
             ret = r.json()
@@ -174,9 +177,10 @@ def FaceIdentify(self, group_id, image_path, data_type = 0):
         else :
             data["group_id"] = group_id
          
-        r = {}
         try:
-            r = requests.post(url, headers=headers, data = json.dumps(data))
+            req = requests.Request('POST',  url, data=json.dumps(data), headers=headers)
+            prepped = self.requests_session.prepare_request(req)
+            r = self.requests_session.send(prepped)
             if r.status_code != 200:  
                 return {'httpcode':r.status_code, 'errorcode':'', 'errormsg':'', "session_id":'', "candidates":[{}]}
             ret = r.json()
@@ -209,9 +213,10 @@ def DetectFace(self, image_path, mode = 0, data_type = 0):
         else :
             data["url"] = image_path
          
-        r = {}
         try:
-            r = requests.post(url, headers=headers, data = json.dumps(data))
+            req = requests.Request('POST',  url, data=json.dumps(data), headers=headers)
+            prepped = self.requests_session.prepare_request(req)
+            r = self.requests_session.send(prepped)
             if r.status_code != 200: 
                 return {'httpcode':r.status_code, 'errorcode':'', 'errormsg':'', "session_id":'', "image_id":'', "image_height":0, "image_width":0, "face":[{}]}
             ret = r.json()
@@ -257,9 +262,10 @@ def NewPerson(self, person_id, image_path, group_ids, person_name= '', tag='', d
         else:
             data["url"] = image_path
             
-        r = {}
         try:
-            r = requests.post(url, headers=headers, data = json.dumps(data))
+            req = requests.Request('POST',  url, data=json.dumps(data), headers=headers)
+            prepped = self.requests_session.prepare_request(req)
+            r = self.requests_session.send(prepped)
             if r.status_code != 200: 
                 return {'httpcode':r.status_code, 'errorcode':'', 'errormsg':'', "person_id":'', "suc_group":'', "suc_face":0, "session_id":0, "face_id":'', "group_ids":''}
                 
@@ -283,9 +289,10 @@ def DelPerson(self, person_id) :
             "person_id" : person_id 
         }
         
-        r = {}
         try:
-            r = requests.post(url, headers=headers, data = json.dumps(data))
+            req = requests.Request('POST',  url, data=json.dumps(data), headers=headers)
+            prepped = self.requests_session.prepare_request(req)
+            r = self.requests_session.send(prepped)
             if r.status_code != 200: 
                  return {'httpcode':r.status_code, 'errorcode':'', 'errormsg':'', "deleted":0, "session_id":''}
                  
@@ -328,9 +335,10 @@ def AddFace(self, person_id, images, tag='', data_type = 0):
         else :
             data["urls"] = images
         
-        r = {}
         try:
-            r = requests.post(url, headers=headers, data = json.dumps(data))
+            req = requests.Request('POST',  url, data=json.dumps(data), headers=headers)
+            prepped = self.requests_session.prepare_request(req)
+            r = self.requests_session.send(prepped)
             if r.status_code != 200: 
                   return {'httpcode':r.status_code, 'errorcode':'', 'errormsg':'', "face_ids":[], "session_id":'', "added": 0, "ret_codes":[]}
                   
@@ -361,9 +369,10 @@ def DelFace(self, person_id, face_ids):
             "face_ids":face_ids
         }
         
-        r = {}
         try:
-            r = requests.post(url, headers=headers, data = json.dumps(data))
+            req = requests.Request('POST',  url, data=json.dumps(data), headers=headers)
+            prepped = self.requests_session.prepare_request(req)
+            r = self.requests_session.send(prepped)
             if r.status_code != 200: 
                 return {'httpcode':r.status_code, 'errorcode':'', 'errormsg':'',  "session_id":'', "deleted ": 0}
                  
@@ -390,9 +399,10 @@ def SetInfo(self, person_id, person_name='', tag=''):
             "tag":tag
         }
         
-        r = {}
         try:
-            r = requests.post(url, headers=headers, data = json.dumps(data))
+            req = requests.Request('POST',  url, data=json.dumps(data), headers=headers)
+            prepped = self.requests_session.prepare_request(req)
+            r = self.requests_session.send(prepped)
             if r.status_code != 200: 
                 return {'httpcode':r.status_code, 'errorcode':'', 'errormsg':'',  "person_id":'', "session_id ": ''}
                 
@@ -416,9 +426,10 @@ def GetInfo(self, person_id):
             "person_id": person_id
         }
         
-        r = {}
         try:
-            r = requests.post(url, headers=headers, data = json.dumps(data))
+            req = requests.Request('POST',  url, data=json.dumps(data), headers=headers)
+            prepped = self.requests_session.prepare_request(req)
+            r = self.requests_session.send(prepped)
             if r.status_code != 200: 
                 return {'httpcode':r.status_code, 'errorcode':'', 'errormsg':'',  "person_id":'', "person_name ": '', "face_ids":[], "tag":'', "secret_id":''}
             ret = r.json()
@@ -438,9 +449,10 @@ def GetGroupIds(self):
             "app_id": self._appid
         }
         
-        r = {}
         try:
-            r = requests.post(url, headers=headers, data = json.dumps(data))
+            req = requests.Request('POST',  url, data=json.dumps(data), headers=headers)
+            prepped = self.requests_session.prepare_request(req)
+            r = self.requests_session.send(prepped)
             if r.status_code != 200:
                 return {'httpcode':r.status_code, 'errorcode':'', 'errormsg':'',  "group_ids":[]}
                 
@@ -464,9 +476,10 @@ def GetPersonIds(self, group_id) :
             "group_id": group_id
         }
         
-        r = {}
         try:
-            r = requests.post(url, headers=headers, data = json.dumps(data))
+            req = requests.Request('POST',  url, data=json.dumps(data), headers=headers)
+            prepped = self.requests_session.prepare_request(req)
+            r = self.requests_session.send(prepped)
             if r.status_code != 200:
                 return {'httpcode':r.status_code, 'errorcode':'', 'errormsg':'', "person_ids":[]}    
                 
@@ -490,9 +503,10 @@ def GetFaceIds(self, person_id):
             "person_id": person_id
         }
         
-        r = {}
         try:
-            r = requests.post(url, headers=headers, data = json.dumps(data))
+            req = requests.Request('POST',  url, data=json.dumps(data), headers=headers)
+            prepped = self.requests_session.prepare_request(req)
+            r = self.requests_session.send(prepped)
             if r.status_code != 200:
                 return {'httpcode':r.status_code, 'errorcode':'', 'errormsg':'',  "face_ids":[]}  
                 
@@ -516,9 +530,10 @@ def GetFaceInfo(self, face_id):
             "face_id": face_id 
         }
         
-        r = {}
         try:
-            r = requests.post(url, headers=headers, data = json.dumps(data))
+            req = requests.Request('POST',  url, data=json.dumps(data), headers=headers)
+            prepped = self.requests_session.prepare_request(req)
+            r = self.requests_session.send(prepped)
             if r.status_code != 200:
                  return {'httpcode':r.status_code, 'errorcode':'', 'errormsg':'',  "face_info":[]}   
                  
@@ -551,9 +566,10 @@ def FaceShape(self, image_path, mode = 0, data_type = 0):
         else:
             data["url"] = image_path
         
-        r = {}
         try:
-            r = requests.post(url, headers=headers, data = json.dumps(data))
+            req = requests.Request('POST',  url, data=json.dumps(data), headers=headers)
+            prepped = self.requests_session.prepare_request(req)
+            r = self.requests_session.send(prepped)
             if r.status_code != 200: 
                 return {'httpcode':r.status_code, 'errorcode':'', 'errormsg':'', "face_shape":[{}], "image_height":0, "image_width":0, "session_id":''}
   
@@ -586,9 +602,10 @@ def fuzzydetect(self, image_path, data_type = 0, seq = ''):
         else:
             data["url"] = image_path
         
-        r = {}
         try:
-            r = requests.post(url, headers=headers, data = json.dumps(data))
+            req = requests.Request('POST',  url, data=json.dumps(data), headers=headers)
+            prepped = self.requests_session.prepare_request(req)
+            r = self.requests_session.send(prepped)
             if r.status_code != 200: 
                 return {'httpcode':r.status_code, 'errorcode':'', 'errormsg':''}
   
@@ -621,9 +638,10 @@ def fooddetect(self, image_path, data_type = 0, seq = ''):
         else:
             data["url"] = image_path
         
-        r = {}
         try:
-            r = requests.post(url, headers=headers, data = json.dumps(data))
+            req = requests.Request('POST',  url, data=json.dumps(data), headers=headers)
+            prepped = self.requests_session.prepare_request(req)
+            r = self.requests_session.send(prepped)
             if r.status_code != 200: 
                 return {'httpcode':r.status_code, 'errorcode':'', 'errormsg':''}
   
@@ -632,8 +650,6 @@ def fooddetect(self, image_path, data_type = 0, seq = ''):
             return {'httpcode':0, 'errorcode':self.IMAGE_NETWORK_ERROR, 'errormsg':str(e)}
                 
         return ret
-    
-    
 
     def imagetag(self, image_path, data_type = 0, seq = ''):
     
@@ -658,9 +674,10 @@ def imagetag(self, image_path, data_type = 0, seq = ''):
         else:
             data["url"] = image_path
         
-        r = {}
         try:
-            r = requests.post(url, headers=headers, data = json.dumps(data))
+            req = requests.Request('POST',  url, data=json.dumps(data), headers=headers)
+            prepped = self.requests_session.prepare_request(req)
+            r = self.requests_session.send(prepped)
             if r.status_code != 200: 
                 return {'httpcode':r.status_code, 'errorcode':'', 'errormsg':''}
   
@@ -693,9 +710,10 @@ def imageporn(self, image_path, data_type = 0, seq = ''):
         else:
             data["url"] = image_path
         
-        r = {}
         try:
-            r = requests.post(url, headers=headers, data = json.dumps(data))
+            req = requests.Request('POST',  url, data=json.dumps(data), headers=headers)
+            prepped = self.requests_session.prepare_request(req)
+            r = self.requests_session.send(prepped)
             if r.status_code != 200: 
                 return {'httpcode':r.status_code, 'errorcode':'', 'errormsg':''}
   
@@ -704,7 +722,7 @@ def imageporn(self, image_path, data_type = 0, seq = ''):
             return {'httpcode':0, 'errorcode':self.IMAGE_NETWORK_ERROR, 'errormsg':str(e)}
                 
         return ret
-        
+    
     def idcardocr(self, image_path, data_type = 0, card_type = 1 ,seq = ''):
     
         req_type='idcardocr' 
@@ -728,9 +746,11 @@ def idcardocr(self, image_path, data_type = 0, card_type = 1 ,seq = ''):
             data["image"] = base64.b64encode(open(filepath, 'rb').read()).rstrip().decode('utf-8')
         else:
             data["url"] = image_path
-        r = {}
+
         try:
-            r = requests.post(url, headers=headers, data = json.dumps(data))
+            req = requests.Request('POST',  url, data=json.dumps(data), headers=headers)
+            prepped = self.requests_session.prepare_request(req)
+            r = self.requests_session.send(prepped)
             if r.status_code != 200: 
                 return {'httpcode':r.status_code, 'errorcode':'', 'errormsg':''}
   
@@ -763,9 +783,10 @@ def namecardocr(self, image_path, data_type = 0, retimage= 1, seq = ''):
         else:
             data["url"] = image_path
 
-        r = {}
         try:
-            r = requests.post(url, headers=headers, data = json.dumps(data))
+            req = requests.Request('POST',  url, data=json.dumps(data), headers=headers)
+            prepped = self.requests_session.prepare_request(req)
+            r = self.requests_session.send(prepped)
             if r.status_code != 200: 
                 return {'httpcode':r.status_code, 'errorcode':'', 'errormsg':''}
   
@@ -786,9 +807,10 @@ def livegetfour(self, seq = ''):
             'seq' : seq
         }
 
-        r = {}
         try:
-            r = requests.post(url, headers = headers, data = json.dumps(data))
+            req = requests.Request('POST',  url, data=json.dumps(data), headers=headers)
+            prepped = self.requests_session.prepare_request(req)
+            r = self.requests_session.send(prepped)
             if r.status_code != 200:
                 return {'httpcode' : r.status_code, 'errorcode' : '', 'errormsg' : '', 'validate_data' : ''}
             ret = r.json()
@@ -834,9 +856,10 @@ def livedetectfour(self, validate_data, video_path,  seq = '', card_path = '', c
         data['validate_data'] = validate_data
         data['compare_flag'] = compare_flag
 
-        r = {}
         try:
-            r = requests.post(url, headers = headers, data = json.dumps(data))
+            req = requests.Request('POST',  url, data=json.dumps(data), headers=headers)
+            prepped = self.requests_session.prepare_request(req)
+            r = self.requests_session.send(prepped)
             if r.status_code != 200:
                 return {'httpcode' : r.status_code, 'errorcode' : '', 'errormsg' : '', 'live_status' : '', 'live_msg' : '', 'compare_status' : '', 'compare_msg' : '', 'sim' : 0, 'photo' : ''}
             ret = r.json()
@@ -875,12 +898,13 @@ def idcardlivedetectfour(self, idcard_number, idcard_name, validate_data, video_
         data['idcard_name'] = idcard_name
         data['validate_data'] = validate_data
 
-        r = {}
         try:
-             r = requests.post(url, headers = headers, data = json.dumps(data))
-             if r.status_code != 200 :
+            req = requests.Request('POST',  url, data=json.dumps(data), headers=headers)
+            prepped = self.requests_session.prepare_request(req)
+            r = self.requests_session.send(prepped)
+            if r.status_code != 200 :
                 return {'httpcode' : r.status_code, 'errorcode' : '', 'errormsg' : '', 'live_status' : '', 'live_msg' : '', 'compare_status' : '', 'compare_msg' : '', 'sim' : 0, 'video_photo' : ''}
-             ret = r.json()
+            ret = r.json()
         except Exception as e:
             return {'httpcode':0, 'errorcode':self.IMAGE_NETWORK_ERROR, 'errormsg':str(e), 'live_status' : '', 'live_msg' : '', 'compare_status' : '', 'compare_msg' : '', 'sim' : 0, 'video_photo' : ''}
 
@@ -914,17 +938,14 @@ def idcardfacecompare(self, idcard_number, idcard_name, image_path, data_type =
         data['idcard_number'] = idcard_number
         data['idcard_name'] = idcard_name
 
-        r = {}
         try:
-             r = requests.post(url, headers = headers, data = json.dumps(data))
-             if r.status_code != 200:
+            req = requests.Request('POST',  url, data=json.dumps(data), headers=headers)
+            prepped = self.requests_session.prepare_request(req)
+            r = self.requests_session.send(prepped)
+            if r.status_code != 200:
                 return {'httpcode' : r.status_code, 'errorcode' : '', 'errormsg' : '', 'similarity' : '', 'session_id' : session_id}
-             ret = r.json()
+            ret = r.json()
         except Exception as e:
             return {'httpcode':0, 'errorcode':self.IMAGE_NETWORK_ERROR, 'errormsg':str(e), 'similarity' : '', 'session_id' : session_id}
 
         return ret
-    
-
-    
-