diff --git a/app/db/models/siteuserdata.py b/app/db/models/siteuserdata.py
index 17b6002c..451e182a 100644
--- a/app/db/models/siteuserdata.py
+++ b/app/db/models/siteuserdata.py
@@ -20,7 +20,7 @@ class SiteUserData(Base):
     # 用户名
     username = Column(String)
     # 用户ID
-    userid = Column(Integer)
+    userid = Column(String)
     # 用户等级
     user_level = Column(String)
     # 加入时间
diff --git a/app/schemas/site.py b/app/schemas/site.py
index d8497ea1..aded2a62 100644
--- a/app/schemas/site.py
+++ b/app/schemas/site.py
@@ -77,7 +77,7 @@ class SiteUserData(BaseModel):
     # 用户名
     username: Optional[str] = None
     # 用户ID
-    userid: Optional[Union[int, str]] = None
+    userid: Optional[str] = None
     # 用户等级
     user_level: Optional[str] = None
     # 加入时间
diff --git a/database/versions/a946dae52526_2_2_1.py b/database/versions/a946dae52526_2_2_1.py
new file mode 100644
index 00000000..5517c852
--- /dev/null
+++ b/database/versions/a946dae52526_2_2_1.py
@@ -0,0 +1,80 @@
+"""2.2.1
+
+Revision ID: a946dae52526
+Revises: 5b3355c964bb
+Create Date: 2025-08-20 17:50:00.000000
+
+"""
+import sqlalchemy as sa
+from alembic import op
+
+from app.log import logger
+from app.core.config import settings
+
+# revision identifiers, used by Alembic.
+revision = 'a946dae52526'
+down_revision = '5b3355c964bb'
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    """
+    升级：将SiteUserData表的userid字段从Integer改为String
+    """
+    connection = op.get_bind()
+    
+    if settings.DB_TYPE.lower() == "postgresql":
+        # PostgreSQL数据库迁移
+        migrate_postgresql_userid(connection)
+
+
+def downgrade() -> None:
+    """
+    降级：将SiteUserData表的userid字段从String改回Integer
+    """
+    pass
+
+
+def migrate_postgresql_userid(connection):
+    """
+    PostgreSQL数据库userid字段迁移
+    """
+    try:
+        logger.info("开始PostgreSQL数据库userid字段迁移...")
+        
+        # 1. 创建临时列
+        connection.execute(sa.text("""
+            ALTER TABLE siteuserdata 
+            ADD COLUMN userid_new VARCHAR
+        """))
+        
+        # 2. 将现有数据转换为字符串并复制到新列
+        connection.execute(sa.text("""
+            UPDATE siteuserdata 
+            SET userid_new = CAST(userid AS VARCHAR)
+            WHERE userid IS NOT NULL
+        """))
+        
+        # 3. 删除旧列
+        connection.execute(sa.text("""
+            ALTER TABLE siteuserdata 
+            DROP COLUMN userid
+        """))
+        
+        # 4. 重命名新列
+        connection.execute(sa.text("""
+            ALTER TABLE siteuserdata 
+            RENAME COLUMN userid_new TO userid
+        """))
+        
+        logger.info("PostgreSQL数据库userid字段迁移完成")
+        
+    except Exception as e:
+        logger.error(f"PostgreSQL数据库userid字段迁移失败: {e}")
+        raise
+
+
+
+
+