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diff --git a/crud.py b/crud.py
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+++ b/crud.py
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+from sqlalchemy.orm import Session
+from models import CityWeather
+from schemas import CityWeatherCreate
+
+def get_city_weather(db: Session, city_id: int):
+    return db.query(CityWeather).filter(CityWeather.id == city_id).first()
+
+def get_city_weather_by_name(db: Session, city_name: str):
+    return db.query(CityWeather).filter(CityWeather.city_name == city_name).first()
+
+def get_city_weathers(db: Session, skip: int = 0, limit: int = 10):
+    return db.query(CityWeather).offset(skip).limit(limit).all()
+
+def create_city_weather(db: Session, city_weather: CityWeatherCreate):
+    db_city_weather = CityWeather(**city_weather.dict())
+    db.add(db_city_weather)
+    db.commit()
+    db.refresh(db_city_weather)
+    return db_city_weather
+
+def update_city_weather(db: Session, city_id: int, city_weather: CityWeatherCreate):
+    db_city = db.query(CityWeather).filter(CityWeather.id == city_id).first()
+    if db_city:
+        for key, value in city_weather.dict(exclude_unset=True).items():
+            setattr(db_city, key, value)
+        db.commit()
+        db.refresh(db_city)
+    return db_city
+
+def delete_city_weather(db: Session, city_id: int):
+    db_city = db.query(CityWeather).filter(CityWeather.id == city_id).first()
+    if db_city:
+        db.delete(db_city)
+        db.commit()
+    return db_city
diff --git a/database.py b/database.py
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+++ b/database.py
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+from sqlalchemy import create_engine
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import sessionmaker
+
+# 使用 mysqlclient
+# SQLALCHEMY_DATABASE_URL = "mysql://username:password@localhost/weather_db"
+
+# 使用 PyMySQL
+SQLALCHEMY_DATABASE_URL = "mysql+pymysql://hackrobot:Xiao4669805@101.42.43.245:3400/hackrobot"
+
+engine = create_engine(SQLALCHEMY_DATABASE_URL, pool_pre_ping=True)
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+Base = declarative_base()
diff --git a/main.py b/main.py
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--- /dev/null
+++ b/main.py
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+from fastapi import FastAPI, HTTPException, Depends
+from sqlalchemy.orm import Session
+# from . import models, schemas, crud
+import models
+import schemas
+import crud
+
+# from .database import SessionLocal, engine
+from database import SessionLocal, engine
+
+
+# 创建数据库表
+models.Base.metadata.create_all(bind=engine)
+
+app = FastAPI()
+
+# 依赖项，用于获取数据库会话
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()
+
+# 创建新的城市天气记录
+@app.post("/city_weather/", response_model=schemas.CityWeather)
+def create_city_weather(city_weather: schemas.CityWeatherCreate, db: Session = Depends(get_db)):
+    db_city = crud.get_city_weather_by_name(db, city_name=city_weather.city_name)
+    if db_city:
+        raise HTTPException(status_code=400, detail="City already registered")
+    return crud.create_city_weather(db=db, city_weather=city_weather)
+
+# 获取城市天气记录
+@app.get("/city_weather/{city_id}", response_model=schemas.CityWeather)
+def read_city_weather(city_id: int, db: Session = Depends(get_db)):
+    db_city_weather = crud.get_city_weather(db, city_id=city_id)
+    if db_city_weather is None:
+        raise HTTPException(status_code=404, detail="City not found")
+    return db_city_weather
+
+# 获取多个城市天气记录
+@app.get("/city_weather/", response_model=list[schemas.CityWeather])
+def read_city_weathers(skip: int = 0, limit: int = 10, db: Session = Depends(get_db)):
+    cities = crud.get_city_weathers(db, skip=skip, limit=limit)
+    return cities
+
+# 更新城市天气记录
+@app.put("/city_weather/{city_id}", response_model=schemas.CityWeather)
+def update_city_weather(city_id: int, city_weather: schemas.CityWeatherCreate, db: Session = Depends(get_db)):
+    db_city = crud.update_city_weather(db=db, city_id=city_id, city_weather=city_weather)
+    if db_city is None:
+        raise HTTPException(status_code=404, detail="City not found")
+    return db_city
+
+# 删除城市天气记录
+@app.delete("/city_weather/{city_id}", response_model=schemas.CityWeather)
+def delete_city_weather(city_id: int, db: Session = Depends(get_db)):
+    db_city = crud.delete_city_weather(db=db, city_id=city_id)
+    if db_city is None:
+        raise HTTPException(status_code=404, detail="City not found")
+    return db_city
diff --git a/models.py b/models.py
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+++ b/models.py
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+from sqlalchemy import Column, Integer, String, Float
+from database import Base
+# from .database import Base
+
+
+class CityWeather(Base):
+    __tablename__ = "citys"
+
+    id = Column(Integer, primary_key=True, index=True)
+    city_name = Column(String(50), unique=True, index=True, nullable=False)
+    temperature = Column(Float, nullable=False)
+    weather = Column(String(100))
+    other_info = Column(String(200))
diff --git a/schemas.py b/schemas.py
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index 0000000..7af61d6
--- /dev/null
+++ b/schemas.py
@@ -0,0 +1,16 @@
+from pydantic import BaseModel
+
+class CityWeatherBase(BaseModel):
+    city_name: str
+    temperature: float
+    weather: str | None = None
+    other_info: str | None = None
+
+class CityWeatherCreate(CityWeatherBase):
+    pass
+
+class CityWeather(CityWeatherBase):
+    id: int
+
+    class Config:
+        orm_mode = True