diff --git a/AI/WxMini/Start.py b/AI/WxMini/Start.py
index 5d73ab14..47c8953e 100644
--- a/AI/WxMini/Start.py
+++ b/AI/WxMini/Start.py
@@ -11,7 +11,22 @@ from jose import JWTError, jwt
 from openai import AsyncOpenAI
 from passlib.context import CryptContext
 from starlette.responses import StreamingResponse
-
+import json
+import oss2
+from alibabacloud_sts20150401 import models as sts_20150401_models
+from alibabacloud_sts20150401.client import Client as Sts20150401Client
+from alibabacloud_tea_openapi.models import Config
+from alibabacloud_tea_openapi.models import Config
+from alibabacloud_sts20150401.client import Client as Sts20150401Client
+from alibabacloud_sts20150401 import models as sts_20150401_models
+from alibabacloud_credentials.client import Client as CredentialClient
+import os
+import json
+import base64
+import hmac
+import datetime
+import time
+import hashlib
 from WxMini.Milvus.Config.MulvusConfig import *
 from WxMini.Milvus.Utils.MilvusCollectionManager import MilvusCollectionManager
 from WxMini.Milvus.Utils.MilvusConnectionPool import *
@@ -20,7 +35,7 @@ from WxMini.Utils.ImageUtil import *
 from WxMini.Utils.MySQLUtil import init_mysql_pool, get_chat_log_by_session, get_user_by_login_name, \
     get_chat_logs_by_risk_flag, get_chat_logs_summary
 from WxMini.Utils.MySQLUtil import update_risk, get_last_chat_log_id
-from WxMini.Utils.OssUtil import upload_mp3_to_oss_from_memory, get_sts_token
+from WxMini.Utils.OssUtil import upload_mp3_to_oss_from_memory, hmacsha256
 from WxMini.Utils.TtsUtil import TTS
 
 # 配置日志
@@ -498,23 +513,94 @@ async def chat_logs_summary(
 
 
 # 获取上传OSS的授权Token
-@app.get("/aichat/get_oss_upload_token")
-async def get_oss_upload_token(current_user: dict = Depends(get_current_user)):
-    # 获取 STS 临时凭证
-    sts_token = get_sts_token()
-    return {
-        "success": True,
-        "message": "获取上传凭证成功",
-        "data": {
-            "access_key_id": sts_token['AccessKeyId'],
-            "access_key_secret": sts_token['AccessKeySecret'],
-            "security_token": sts_token['SecurityToken'],
-            "bucket_name": BUCKET_NAME,
-            "endpoint": ENDPOINT,
-            "login_name": current_user["login_name"],
-            "person_name": current_user["person_name"]
-        }
+@app.get("/aichat/get_post_signature_for_oss_upload")
+async def generate_upload_params(current_user: dict = Depends(get_current_user)):
+    logger.info(f"current_user={current_user['login_name']}")
+    # 子账号的AK,SK,ARN
+    access_key_id = "LTAI5tJrhwuBzF2X9USrzubX"
+    access_key_secret = "I6ezLuYhk9z9MRjXD2q99STSpTONwW"
+    role_arn_for_oss_upload = "acs:ram::1546399445482588:role/huanghai-create-role"
+    # 桶名
+    oss_bucket = 'hzkc'
+    # 区域
+    region_id = 'cn-beijing'
+    host = f'http://{oss_bucket}.oss-cn-beijing.aliyuncs.com'
+    upload_dir = 'Upload'  # 指定上传到OSS的文件前缀。
+    role_session_name = 'role_session_name'  # 自定义会话名称
+
+    # 初始化配置，直接传递凭据
+    config = Config(
+        region_id=region_id,
+        access_key_id=access_key_id,
+        access_key_secret=access_key_secret
+    )
+
+    # 创建 STS 客户端并获取临时凭证
+    sts_client = Sts20150401Client(config=config)
+    assume_role_request = sts_20150401_models.AssumeRoleRequest(
+        role_arn=role_arn_for_oss_upload,
+        role_session_name=role_session_name
+    )
+    response = sts_client.assume_role(assume_role_request)
+    token_data = response.body.credentials.to_map()
+
+    # 使用 STS 返回的临时凭据
+    sts_access_key_id = token_data['AccessKeyId']
+    sts_access_key_secret = token_data['AccessKeySecret']
+    security_token = token_data['SecurityToken']
+
+    now = int(time.time())
+    # 将时间戳转换为datetime对象
+    dt_obj = datetime.datetime.utcfromtimestamp(now)
+    # 在当前时间增加3小时，设置为请求的过期时间
+    dt_obj_plus_3h = dt_obj + datetime.timedelta(hours=1)
+
+    # 请求时间
+    dt_obj_1 = dt_obj.strftime('%Y%m%dT%H%M%S') + 'Z'
+    # 请求日期
+    dt_obj_2 = dt_obj.strftime('%Y%m%d')
+    # 请求过期时间
+    expiration_time = dt_obj_plus_3h.strftime('%Y-%m-%dT%H:%M:%S.000Z')
+
+    # 构建 Policy 并生成签名
+    policy = {
+        "expiration": expiration_time,
+        "conditions": [
+            ["eq", "$success_action_status", "200"],
+            {"x-oss-signature-version": "OSS4-HMAC-SHA256"},
+            {"x-oss-credential": f"{sts_access_key_id}/{dt_obj_2}/{region_id}/oss/aliyun_v4_request"},
+            {"x-oss-security-token": security_token},
+            {"x-oss-date": dt_obj_1},
+        ]
+    }
+    policy_str = json.dumps(policy).strip()
+
+    # 步骤2：构造待签名字符串（StringToSign）
+    stringToSign = base64.b64encode(policy_str.encode()).decode()
+
+    # 步骤3：计算SigningKey
+    dateKey = hmacsha256(("aliyun_v4" + sts_access_key_secret).encode(), dt_obj_2)
+    dateRegionKey = hmacsha256(dateKey, region_id)
+    dateRegionServiceKey = hmacsha256(dateRegionKey, "oss")
+    signingKey = hmacsha256(dateRegionServiceKey, "aliyun_v4_request")
+
+    # 步骤4：计算Signature
+    result = hmacsha256(signingKey, stringToSign)
+    signature = result.hex()
+
+    # 组织返回数据
+    response_data = {
+        'policy': stringToSign,  # 表单域
+        'x_oss_signature_version': "OSS4-HMAC-SHA256",  # 指定签名的版本和算法，固定值为OSS4-HMAC-SHA256
+        'x_oss_credential': f"{sts_access_key_id}/{dt_obj_2}/{region_id}/oss/aliyun_v4_request",  # 指明派生密钥的参数集
+        'x_oss_date': dt_obj_1,  # 请求的时间
+        'signature': signature,  # 签名认证描述信息
+        'host': host,
+        'dir': upload_dir,
+        'security_token': security_token  # 安全令牌
+
     }
+    return response_data
 
 
 @app.get("/aichat/process_image")
diff --git a/AI/WxMini/Utils/OssUtil.py b/AI/WxMini/Utils/OssUtil.py
index d578aa75..c8b03b0b 100644
--- a/AI/WxMini/Utils/OssUtil.py
+++ b/AI/WxMini/Utils/OssUtil.py
@@ -1,9 +1,8 @@
 # https://help.aliyun.com/zh/oss/use-cases/add-signatures-on-the-client-by-using-javascript-and-upload-data-to-oss?spm=a2c4g.11186623.help-menu-31815.d_6_1_0_1.2dd15d03SrLg4Q#4f036801celh7
-import json
+import hashlib
+import hmac
+
 import oss2
-from alibabacloud_sts20150401 import models as sts_20150401_models
-from alibabacloud_sts20150401.client import Client as Sts20150401Client
-from alibabacloud_tea_openapi.models import Config
 
 from WxMini.Milvus.Config.MulvusConfig import *
 
@@ -11,7 +10,6 @@ from WxMini.Milvus.Config.MulvusConfig import *
 auth = oss2.Auth(ACCESS_KEY_ID, ACCESS_KEY_SECRET)
 bucket = oss2.Bucket(auth, ENDPOINT, BUCKET_NAME)
 
-
 def upload_mp3_to_oss(file_path, oss_object_name):
     """
     上传本地 MP3 文件到 OSS
@@ -41,38 +39,20 @@ def upload_mp3_to_oss_from_memory(oss_object_name, audio_data):
         print(f"上传失败: {e}")
 
 
-def get_sts_token(access_key_id="LTAI5tJrhwuBzF2X9USrzubX", access_key_secret="I6ezLuYhk9z9MRjXD2q99STSpTONwW", role_arn="acs:ram::1546399445482588:role/huanghai-create-role", role_session_name="role_session_name"):
+def hmacsha256(key, data):
     """
-    获取 STS 临时凭证
-    :param access_key_id: 阿里云 AccessKey ID (默认值: "LTAI5tJrhwuBzF2X9USrzubX")
-    :param access_key_secret: 阿里云 AccessKey Secret (默认值: "I6ezLuYhk9z9MRjXD2q99STSpTONwW")
-    :param role_arn: RAM 角色 ARN (默认值: "acs:ram::1546399445482588:role/huanghai-create-role")
-    :param role_session_name: 自定义会话名称 (默认值: "role_session_name")
-    :return: 包含 AccessKeyId、AccessKeySecret 和 SecurityToken 的字典
-    """
-    # 初始化 Config
-    config = Config(
-        region_id=REGION_ID,
-        access_key_id=access_key_id,
-        access_key_secret=access_key_secret
-    )
-
-    # 创建 STS 客户端并获取临时凭证
-    sts_client = Sts20150401Client(config=config)
-    assume_role_request = sts_20150401_models.AssumeRoleRequest(
-        role_arn=role_arn,
-        role_session_name=role_session_name
-    )
-    response = sts_client.assume_role(assume_role_request)
-    token = json.dumps(response.body.credentials.to_map())
+    计算HMAC-SHA256哈希值的函数
 
-    # 解析 token
-    token_dict = json.loads(token)
-    return {
-        'AccessKeyId': token_dict['AccessKeyId'],
-        'AccessKeySecret': token_dict['AccessKeySecret'],
-        'SecurityToken': token_dict['SecurityToken']
-    }
+    :param key: 用于计算哈希的密钥，字节类型
+    :param data: 要进行哈希计算的数据，字符串类型
+    :return: 计算得到的HMAC-SHA256哈希值，字节类型
+    """
+    try:
+        mac = hmac.new(key, data.encode(), hashlib.sha256)
+        hmacBytes = mac.digest()
+        return hmacBytes
+    except Exception as e:
+        raise RuntimeError(f"Failed to calculate HMAC-SHA256 due to {e}")
 
 def upload_to_oss(access_key_id, access_key_secret, security_token, endpoint=ENDPOINT, bucket_name=BUCKET_NAME, file_key="Upload/example.txt", file_content="Hello, OSS!"):
     """