diff --git a/dsAiTeachingModel/main.py b/dsAiTeachingModel/main.py
index d7b3cfdc..2bacc306 100644
--- a/dsAiTeachingModel/main.py
+++ b/dsAiTeachingModel/main.py
@@ -19,14 +19,14 @@ logging.basicConfig(
 )
 
 async def lifespan(app: FastAPI):
-    # 创建数据库连接池
-    await init_database()
-
+    print("Starting up...")
     # 启动异步任务
     asyncio.create_task(train_document_task())
-
-    yield
-    await shutdown_database()
+    try:
+        yield
+    finally:
+        print("Shutting down...")
+        # 如果有需要在关闭时执行的任务，可以在这里添加
 
 app = FastAPI(lifespan=lifespan)
 
diff --git a/dsAiTeachingModel/utils/Database.py b/dsAiTeachingModel/utils/Database.py
index ebfce2d6..78799c35 100644
--- a/dsAiTeachingModel/utils/Database.py
+++ b/dsAiTeachingModel/utils/Database.py
@@ -1,51 +1,15 @@
 # Database.py
 import datetime
 import logging
-import asyncpg
 
-from Config.Config import *
-
-# 创建一个全局的连接池
-pool = None
-
-async def create_pool():
-    global pool
-    pool = await asyncpg.create_pool(
-        host=POSTGRES_HOST,
-        port=POSTGRES_PORT,
-        user=POSTGRES_USER,
-        password=POSTGRES_PASSWORD,
-        database=POSTGRES_DATABASE,
-        min_size=1,  # 设置连接池最小连接数
-        max_size=10  # 设置连接池最大连接数
-    )
-
-async def get_connection():
-    if pool is None:
-        raise Exception("连接池未初始化")
-    async with pool.acquire() as conn:
-        return conn
-
-async def close_pool():
-    if pool is not None:
-        await pool.close()
-
-# 初始化连接池的函数
-async def init_database():
-    await create_pool()
-
-# 关闭连接池的函数
-async def shutdown_database():
-    await close_pool()
+from utils.PostgreSQLUtil import init_postgres_pool
 
 
 # 根据sql语句查询数据
 async def find_by_sql(sql: str, params: tuple):
-    if pool is None:
-        logging.error("数据库连接池未创建")
-        return None
     try:
-        async with pool.acquire() as conn:
+        pg_pool = await init_postgres_pool()
+        async with pg_pool.acquire() as conn:
             result = await conn.fetch(sql, *params)
             # 将 asyncpg.Record 转换为字典
             result_dict = [dict(record) for record in result]
@@ -101,7 +65,8 @@ async def insert(tableName, param, onlyForParam=False):
     sql = f"INSERT INTO {tableName} ({column_names}) VALUES ({placeholder_names}) RETURNING id"
 
     try:
-        async with pool.acquire() as conn:
+        pg_pool = await init_postgres_pool()
+        async with pg_pool.acquire() as conn:
             result = await conn.fetchrow(sql, *values)
         if result:
             return result['id']
@@ -148,7 +113,8 @@ async def update(table_name, param, property_name, property_value, only_for_para
     values.append(property_value)
 
     try:
-        async with pool.acquire() as conn:
+        pg_pool = await init_postgres_pool()
+        async with pg_pool.acquire() as conn:
             result = await conn.fetchrow(sql, *values)
             if result:
                 return result['id']
@@ -190,7 +156,8 @@ async def delete_by_id(table_name, property_name, property_value):
         logging.debug(sql)
         # 执行删除
         try:
-            async with pool.acquire() as conn:
+            pg_pool = await init_postgres_pool()
+            async with pg_pool.acquire() as conn:
                 result = await conn.execute(sql, property_value)
                 if result:
                     return True
@@ -209,9 +176,9 @@ async def delete_by_id(table_name, property_name, property_value):
 
 # 执行一个SQL语句
 async def execute_sql(sql, params):
-    logging.debug(sql)
     try:
-        async with pool.acquire() as conn:
+        pg_pool = await init_postgres_pool()
+        async with pg_pool.acquire() as conn:
             await conn.fetch(sql, *params)
     except Exception as e:
         logging.error(f"数据库查询错误: {e}")