diff --git a/backend/app/models/level.py b/backend/app/models/level.py
index e8ab023..239fa20 100644
--- a/backend/app/models/level.py
+++ b/backend/app/models/level.py
@@ -14,7 +14,7 @@ from typing import Optional, List
 from sqlalchemy import Column, Integer, String, DateTime, Date, Boolean, ForeignKey, Text
 from sqlalchemy.orm import relationship
 
-from app.models.base import BaseModel
+from app.models.base import Base, BaseModel
 
 
 class UserLevel(BaseModel):
@@ -105,7 +105,7 @@ class UserBadge(BaseModel):
     deleted_at = None
 
 
-class LevelConfig(BaseModel):
+class LevelConfig(Base):
     """等级配置表"""
     __tablename__ = "level_configs"
 
@@ -115,10 +115,7 @@ class LevelConfig(BaseModel):
     total_exp_required = Column(Integer, nullable=False, comment="累计所需经验值")
     title = Column(String(50), nullable=False, comment="等级称号")
     color = Column(String(20), nullable=True, comment="等级颜色")
-    
-    # 不继承软删除字段
-    is_deleted = None
-    deleted_at = None
+    created_at = Column(DateTime, nullable=False, default=datetime.now)
 
 
 # 经验值类型枚举