diff --git a/.env b/.env
index cb0341f..bf0b75e 100644
--- a/.env
+++ b/.env
@@ -7,6 +7,8 @@ OCR_API_URL=https://paddleocr.aistudio-app.com/api/v2/ocr/jobs
 OCR_API_TOKEN=df7dcc85a5c3c9d64e421f353d11d13ec45512f6
 OCR_MODEL=PaddleOCR-VL-1.6
 
-MODEL_NAME=deepseek-v4-flash
-MODEL_BASE_URL=https://api.deepseek.com
-MODEL_API_KEY=sk-0b237d41f6bc44fc9732ea66bd7eade0
\ No newline at end of file
+MODEL_NAME="glm-5.2"
+MODEL_BASE_URL="https://dashscope.aliyuncs.com/compatible-mode/v1"
+MODEL_API_KEY="sk-52bcd98e9c1d45908437c4e8706eefff"
+
+DATABASE_URL=postgresql+asyncpg://agent:medical%402019@60.247.145.200:5432/study
diff --git a/agent/model.py b/agent/model.py
index 0dd7587..0195c6f 100644
--- a/agent/model.py
+++ b/agent/model.py
@@ -11,3 +11,7 @@ model = init_chat_model(
     base_url=os.getenv('MODEL_BASE_URL'),
     api_key=os.getenv('MODEL_API_KEY')
 )
+
+# MODEL_NAME=deepseek-v4-flash
+# MODEL_BASE_URL=https://api.deepseek.com
+# MODEL_API_KEY=sk-0b237d41f6bc44fc9732ea66bd7eade0
diff --git a/agent/prompt.py b/agent/prompt.py
index d3c1629..431b86f 100644
--- a/agent/prompt.py
+++ b/agent/prompt.py
@@ -1,27 +1,50 @@
 study_prompt = """
-你是一位专业的出题专家，擅长根据学习材料生成高质量选择题。
+你是一位专业的出题专家，擅长根据学习材料生成高质量的客观题（单选题和多选题）。
 
-要求：
-1. 题目必须严格基于学习内容，不得编造知识点。
-2. 每道题只有 1 个正确答案。
-3. 干扰项要有迷惑性。
-4. 输出必须是纯 JSON，禁止 Markdown。
-5. 不要修改专业术语。
+请根据下方【学习材料】生成 5～10 道题目，严格遵守以下要求：
 
-返回格式：
-{
-  "questions": [
-    {
-      "id": 1,
-      "question": "题目内容",
-      "options": {
-        "A": "选项A内容",
-        "B": "选项B内容",
-        "C": "选项C内容",
-        "D": "选项D内容"
-      },
-      "answer": "A"
-    }
-  ]
-}
+1. **题型要求**
+   - 可包含单选题和多选题。
+   - 多选题至少 2 个正确选项，最多不超过 4 个。
+   - 每道题的选项固定为 4 项（A/B/C/D）。
+
+2. **出题原则**
+   - 所有题目必须严格基于【学习材料】，不得编造知识点。
+   - 干扰项应具有一定迷惑性，但不能是完全无关或明显错误的内容。
+   - 专业术语必须与材料保持一致，禁止改写、简写或口语化。
+   - 题目表述必须自然、规范，禁止出现“根据材料”“根据以上内容”“原文指出”等提示语。
+   - 题目应像正式考试题一样直接提问。
+
+3. **输出要求（非常重要）**
+   - 仅返回纯 JSON，禁止输出 Markdown、代码块、注释或任何说明文字。
+   - 必须返回一个 JSON 数组，不得以对象包裹。
+   - JSON 必须是合法格式，可被程序直接解析。
+
+4. **返回格式（严格遵循）**
+[
+  {
+    "id": 1,
+    "type": "single",
+    "question": "题目内容",
+    "options": [
+      "选项A内容",
+      "选项B内容",
+      "选项C内容",
+      "选项D内容"
+    ],
+    "answer": ["A"]
+  },
+  {
+    "id": 2,
+    "type": "multiple",
+    "question": "题目内容",
+    "options": [
+      "选项A内容",
+      "选项B内容",
+      "选项C内容",
+      "选项D内容"
+    ],
+    "answer": ["A", "C"]
+  }
+]
 """
\ No newline at end of file
diff --git a/database.py b/database.py
new file mode 100644
index 0000000..be02d12
--- /dev/null
+++ b/database.py
@@ -0,0 +1,27 @@
+from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession
+from sqlalchemy.orm import declarative_base, sessionmaker
+from dotenv import load_dotenv
+import os
+
+load_dotenv()
+
+DATABASE_URL = os.getenv("DATABASE_URL")
+
+engine = create_async_engine(
+    DATABASE_URL,
+    echo=True,
+    future=True
+)
+
+AsyncSessionLocal = sessionmaker(
+    bind=engine,
+    class_=AsyncSession,
+    expire_on_commit=False
+)
+
+Base = declarative_base()
+
+
+async def get_db():
+    async with AsyncSessionLocal() as session:
+        yield session
diff --git a/id_generator/__init__.py b/id_generator/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/id_generator/generator.py b/id_generator/generator.py
new file mode 100644
index 0000000..fc995d7
--- /dev/null
+++ b/id_generator/generator.py
@@ -0,0 +1,38 @@
+"""
+雪花算法生成器IdGenerator
+"""
+
+# !/usr/bin/python
+# coding=UTF-8
+
+
+from . import options
+from . import snowflake_m1
+
+
+class DefaultIdGenerator:
+    """
+    ID生成器
+    """
+
+    def __init__(self):
+        self.snowflake = None
+
+    def set_id_generator(self, option: options.IdGeneratorOptions):
+        """
+        设置id生成规则信息
+        """
+
+        if option.base_time < 100000:
+            raise ValueError("base time error.")
+
+        self.snowflake = snowflake_m1.SnowFlakeM1(option)
+
+    def next_id(self) -> int:
+        """
+        获取新的UUID
+        """
+
+        if self.snowflake is None:
+            raise ValueError("please set id generator at first.")
+        return self.snowflake.next_id()
diff --git a/id_generator/idregister.py b/id_generator/idregister.py
new file mode 100644
index 0000000..787faac
--- /dev/null
+++ b/id_generator/idregister.py
@@ -0,0 +1,134 @@
+"""
+worker id generator
+"""
+
+# !/usr/bin/python
+# coding=UTF-8
+
+
+from threading import Thread
+import time
+import logging
+import redis
+
+
+class Register:
+    """
+    redis封装
+    - host 代表redis ip
+    - port 代表redis端口
+    - max_worker_id worker_id的最大值, 默认为100
+    - password redis的密码, 默认为空
+    """
+
+    def __init__(self, host, port, max_worker_id=100, password=None):
+        self.redis_impl = redis.StrictRedis(host=host, port=port, db=0, password=password)
+        self.loop_count = 0
+        self.max_loop_count = 10
+        self.worker_id_expire_time = 15
+        self.max_worker_id = max_worker_id
+        self.worker_id = -1
+        self.is_stop = False
+
+    def get_lock(self, key):
+        """
+        获取分布式全局锁,并设置过期时间为30秒
+        """
+
+        if self.redis_impl.setnx(key, 1):
+            self.redis_impl.expire(key, 30)
+            return True
+        if self.redis_impl.ttl(key) < 0:
+            self.redis_impl.expire(key, 30)
+        return False
+
+    def stop(self):
+        """
+        退出注册器的线程
+        """
+
+        self.is_stop = True
+
+    def get_worker_id(self):
+        """
+        获取全局唯一worker_id, 会创建一个线程给worker id续期
+        失败返回-1
+        """
+
+        self.loop_count = 0
+
+        def extern_life(my_id):
+            while 1:
+                time.sleep(self.worker_id_expire_time / 3)
+                # 是否关闭了
+                if self.is_stop:
+                    return
+                # 更新生命周期
+                if self.worker_id != my_id:
+                    break
+                try:
+                    self.redis_impl.expire(
+                        f"IdGen:WorkerId:Value:{my_id}",
+                        self.worker_id_expire_time)
+                except Exception as exe:
+                    logging.error(exe)
+                continue
+
+        self.worker_id = self.__get_next_worker_id()
+        if self.worker_id > -1:
+            Thread(target=extern_life, args=[self.worker_id]).start()
+        return self.worker_id
+
+    def __get_next_worker_id(self):
+        """
+        获取全局唯一worker id内部实现
+        """
+
+        cur = self.redis_impl.incrby("IdGen:WorkerId:Index", 1)
+
+        def can_reset():
+            try:
+                reset_value = self.redis_impl.incr("IdGen:WorkerId:Value:Edit")
+                return reset_value != 1
+            except Exception as ept:
+                logging.error(ept)
+                return False
+
+        def end_reset():
+            try:
+                self.redis_impl.set("IdGen:WorkerId:Value:Edit", 0)
+            except Exception as ept:
+                logging.error(ept)
+
+        def is_available(worker_id: int):
+            try:
+                rst = self.redis_impl.get(f"IdGen:WorkerId:Value:{worker_id}")
+                return rst != "Y"
+            except Exception as ept:
+                logging.error(ept)
+                return False
+
+        if cur > self.max_worker_id:
+            if can_reset():
+                self.redis_impl.set("IdGen:WorkerId:Index", -1)
+                end_reset()
+                self.loop_count += 1
+
+                if self.loop_count > self.max_loop_count:
+                    self.loop_count = 0
+                    return -1
+
+                time.sleep(0.2 * self.loop_count)
+                return self.__get_next_worker_id()
+            time.sleep(0.2)
+            return self.__get_next_worker_id()
+        if is_available(cur):
+            self.redis_impl.setex(
+                f"IdGen:WorkerId:Value:{cur}",
+                self.worker_id_expire_time,
+                "Y"
+            )
+            self.loop_count = 0
+            return cur
+
+        return self.__get_next_worker_id()
diff --git a/id_generator/options.py b/id_generator/options.py
new file mode 100644
index 0000000..8558381
--- /dev/null
+++ b/id_generator/options.py
@@ -0,0 +1,43 @@
+"""
+生成器IdGenerator配置选项
+"""
+
+# !/usr/bin/python
+# coding=UTF-8
+
+
+class IdGeneratorOptions:
+    """
+    ID生成器配置
+    - worker_id 全局唯一id, 区分不同uuid生成器实例
+    - worker_id_bit_length 生成的uuid中worker_id占用的位数
+    - seq_bit_length 生成的uuid中序列号占用的位数
+    """
+
+    def __init__(self, worker_id=0, worker_id_bit_length=6, seq_bit_length=6):
+
+        # 雪花计算方法,（1-漂移算法|2-传统算法）, 默认1。目前只实现了1。
+        self.method = 1
+
+        # 基础时间（ms单位）, 不能超过当前系统时间
+        self.base_time = 1582136402000
+
+        # 机器码, 必须由外部设定, 最大值 2^worker_id_bit_length-1
+        self.worker_id = worker_id
+
+        # 机器码位长, 默认值6, 取值范围 [1, 15]（要求：序列数位长+机器码位长不超过22）
+        self.worker_id_bit_length = worker_id_bit_length
+
+        # 序列数位长, 默认值6, 取值范围 [3, 21]（要求：序列数位长+机器码位长不超过22）
+        self.seq_bit_length = seq_bit_length
+
+        # 最大序列数（含）, 设置范围 [max_seq_number, 2^seq_bit_length-1]
+        # 默认值0, 表示最大序列数取最大值（2^seq_bit_length-1]）
+        self.max_seq_number = 0
+
+        # 最小序列数（含）, 默认值5, 取值范围 [5, max_seq_number], 每毫秒的前5个序列数对应编号0-4是保留位
+        # 其中1-4是时间回拨相应预留位, 0是手工新值预留位
+        self.min_seq_number = 5
+
+        # 最大漂移次数（含）, 默认2000, 推荐范围500-10000（与计算能力有关）
+        self.top_over_cost_count = 2000
diff --git a/id_generator/snowflake.py b/id_generator/snowflake.py
new file mode 100644
index 0000000..ea36cfa
--- /dev/null
+++ b/id_generator/snowflake.py
@@ -0,0 +1,20 @@
+
+"""
+雪花算法生成器接口声明
+"""
+
+# !/usr/bin/python
+# coding=UTF-8
+
+
+class SnowFlake():
+
+    def __init__(self, options):
+        self.options = options
+
+    def next_id(self) -> int:
+        """
+        获取新的UUID
+        """
+        
+        return 0
diff --git a/id_generator/snowflake_m1.py b/id_generator/snowflake_m1.py
new file mode 100644
index 0000000..596b76d
--- /dev/null
+++ b/id_generator/snowflake_m1.py
@@ -0,0 +1,147 @@
+"""
+M1生成器
+"""
+
+# !/usr/bin/python
+# coding=UTF-8
+
+import threading
+import time
+from .snowflake import SnowFlake
+from .options import IdGeneratorOptions
+
+
+class SnowFlakeM1(SnowFlake):
+    """
+    M1规则ID生成器配置
+    """
+
+    def __init__(self, options: IdGeneratorOptions):
+        # 1.base_time
+        self.base_time = 1582136402000
+        if options.base_time != 0:
+            self.base_time = int(options.base_time)
+
+        # 2.worker_id_bit_length
+        self.worker_id_bit_length = 6
+        if options.worker_id_bit_length != 0:
+            self.worker_id_bit_length = int(options.worker_id_bit_length)
+
+        # 3.worker_id
+        self.worker_id = options.worker_id
+
+        # 4.seq_bit_length
+        self.seq_bit_length = 6
+        if options.seq_bit_length != 0:
+            self.seq_bit_length = int(options.seq_bit_length)
+
+        # 5.max_seq_number
+        self.max_seq_number = int(options.max_seq_number)
+        if options.max_seq_number <= 0:
+            self.max_seq_number = (1 << self.seq_bit_length) - 1
+
+        # 6.min_seq_number
+        self.min_seq_number = int(options.min_seq_number)
+
+        # 7.top_over_cost_count
+        self.top_over_cost_count = int(options.top_over_cost_count)
+
+        # 8.Others
+        self.__timestamp_shift = self.worker_id_bit_length + self.seq_bit_length
+        self.__current_seq_number = self.min_seq_number
+        self.__last_time_tick: int = 0
+        self.__turn_back_time_tick: int = 0
+        self.__turn_back_index: int = 0
+        self.__is_over_cost = False
+        self.___over_cost_count_in_one_term: int = 0
+        self.__id_lock = threading.Lock()
+
+    def __next_over_cost_id(self) -> int:
+        current_time_tick = self.__get_current_time_tick()
+        if current_time_tick > self.__last_time_tick:
+            self.__last_time_tick = current_time_tick
+            self.__current_seq_number = self.min_seq_number
+            self.__is_over_cost = False
+            self.___over_cost_count_in_one_term = 0
+            return self.__calc_id(self.__last_time_tick)
+
+        if self.___over_cost_count_in_one_term >= self.top_over_cost_count:
+            self.__last_time_tick = self.__get_next_time_tick()
+            self.__current_seq_number = self.min_seq_number
+            self.__is_over_cost = False
+            self.___over_cost_count_in_one_term = 0
+            return self.__calc_id(self.__last_time_tick)
+
+        if self.__current_seq_number > self.max_seq_number:
+            self.__last_time_tick += 1
+            self.__current_seq_number = self.min_seq_number
+            self.__is_over_cost = True
+            self.___over_cost_count_in_one_term += 1
+            return self.__calc_id(self.__last_time_tick)
+
+        return self.__calc_id(self.__last_time_tick)
+
+    def __next_normal_id(self) -> int:
+        current_time_tick = self.__get_current_time_tick()
+        if current_time_tick < self.__last_time_tick:
+            if self.__turn_back_time_tick < 1:
+                self.__turn_back_time_tick = self.__last_time_tick - 1
+                self.__turn_back_index += 1
+                # 每毫秒序列数的前5位是预留位, 0用于手工新值, 1-4是时间回拨次序
+                # 支持4次回拨次序（避免回拨重叠导致ID重复）, 可无限次回拨（次序循环使用）。
+                if self.__turn_back_index > 4:
+                    self.__turn_back_index = 1
+
+            return self.__calc_turn_back_id(self.__turn_back_time_tick)
+
+        # 时间追平时, _TurnBackTimeTick清零
+        self.__turn_back_time_tick = min(self.__turn_back_time_tick, 0)
+
+        if current_time_tick > self.__last_time_tick:
+            self.__last_time_tick = current_time_tick
+            self.__current_seq_number = self.min_seq_number
+            return self.__calc_id(self.__last_time_tick)
+
+        if self.__current_seq_number > self.max_seq_number:
+            self.__last_time_tick += 1
+            self.__current_seq_number = self.min_seq_number
+            self.__is_over_cost = True
+            self.___over_cost_count_in_one_term = 1
+            return self.__calc_id(self.__last_time_tick)
+
+        return self.__calc_id(self.__last_time_tick)
+
+    def __calc_id(self, use_time_tick) -> int:
+        self.__current_seq_number += 1
+        return (
+                       (use_time_tick << self.__timestamp_shift) +
+                       (self.worker_id << self.seq_bit_length) +
+                       self.__current_seq_number
+               ) % int(1e64)
+
+    def __calc_turn_back_id(self, use_time_tick) -> int:
+        self.__turn_back_time_tick -= 1
+        return (
+                       (use_time_tick << self.__timestamp_shift) +
+                       (self.worker_id << self.seq_bit_length) +
+                       self.__turn_back_index
+               ) % int(1e64)
+
+    def __get_current_time_tick(self) -> int:
+        return int((time.time_ns() / 1e6) - self.base_time)
+
+    def __get_next_time_tick(self) -> int:
+        temp_time_ticker = self.__get_current_time_tick()
+        while temp_time_ticker <= self.__last_time_tick:
+            # 0.001 = 1 mili sec
+            time.sleep(0.001)
+            temp_time_ticker = self.__get_current_time_tick()
+        return temp_time_ticker
+
+    def next_id(self) -> int:
+        with self.__id_lock:
+            if self.__is_over_cost:
+                nextid = self.__next_over_cost_id()
+            else:
+                nextid = self.__next_normal_id()
+            return nextid
diff --git a/main.py b/main.py
index f81e90f..98f2c86 100644
--- a/main.py
+++ b/main.py
@@ -1,9 +1,15 @@
-from fastapi import FastAPI, UploadFile, File
+from typing import List
+
+from fastapi import FastAPI, UploadFile, File, Depends
+from sqlalchemy.ext.asyncio import AsyncSession
 from starlette.middleware.cors import CORSMiddleware
 from starlette.responses import StreamingResponse
 
-from models.agent import QueryRequest
-from service import query_agent
+from database import get_db
+from schemas.agent import QueryRequest
+from schemas.library import LibraryFileRequest, LibraryFileResponse
+from service.agent_service import query_agent
+from service.library_service import add_file, get_file, list_files
 from storage import upload_rustfs
 from ocr import ocr_from_url
 
@@ -34,3 +40,19 @@ def generate(query: QueryRequest):
         query_agent(query),
         media_type="text/event-stream"
     )
+
+
+@app.post("/files", response_model=bool)
+async def add_library_file(data: LibraryFileRequest, db: AsyncSession = Depends(get_db)):
+    await add_file(db, data)
+    return True
+
+
+@app.get("/files", response_model=List[LibraryFileResponse])
+async def list_library_file(db: AsyncSession = Depends(get_db)):
+    return await list_files(db)
+
+
+@app.get("/files/{file_id}", response_model=LibraryFileResponse)
+async def get_library_file(file_id: int, db: AsyncSession = Depends(get_db)):
+    return await get_file(db, file_id)
diff --git a/models/base.py b/models/base.py
new file mode 100644
index 0000000..f3b5a52
--- /dev/null
+++ b/models/base.py
@@ -0,0 +1,43 @@
+from datetime import datetime
+
+from sqlalchemy import Column, BigInteger, String, event, TIMESTAMP, func
+from sqlalchemy.ext.declarative import declared_attr
+
+from utils.common import camel_to_snake
+
+from database import Base
+from id_generator import options, generator
+
+# https://github.com/yitter/IdGenerator/tree/master/Python
+options = options.IdGeneratorOptions(worker_id=23)
+idgen = generator.DefaultIdGenerator()
+idgen.set_id_generator(options)
+
+
+# 第一层基类：包含ID
+class IdBase(Base):
+    __abstract__ = True
+
+    id = Column(BigInteger, primary_key=True, index=True)
+
+    @declared_attr
+    def __tablename__(cls):
+        # 自动把数据库实体类名驼峰转为数据库表名下划线
+        return camel_to_snake(cls.__name__)
+
+
+# 自动填充id
+@event.listens_for(IdBase, 'before_insert', propagate=True)
+def before_insert_listener(mapper, connection, target):
+    if target.id is None:
+        target.id = idgen.next_id()
+
+
+# 第二层基类：包含ID和审计字段
+class AuditBase(IdBase):
+    __abstract__ = True
+
+    create_time = Column(TIMESTAMP, nullable=False, default=datetime.now)
+    create_by = Column(String(255), nullable=True)
+    update_time = Column(TIMESTAMP, nullable=False, default=datetime.now, onupdate=datetime.now)
+    update_by = Column(String(255), nullable=True)
diff --git a/models/library.py b/models/library.py
new file mode 100644
index 0000000..a1fc583
--- /dev/null
+++ b/models/library.py
@@ -0,0 +1,33 @@
+from sqlalchemy import Column, BigInteger, String, Text, TIMESTAMP, Integer, ForeignKey
+from sqlalchemy.dialects.postgresql import JSONB
+from sqlalchemy.orm import relationship
+
+from models.base import AuditBase
+
+
+class LibraryFile(AuditBase):
+    subject = Column(String(45), nullable=False)
+    module = Column(String(45), nullable=False)
+    name = Column(String(45), nullable=False)
+    type = Column(String(45), nullable=False)
+    size = Column(Integer, nullable=False)
+
+    questions = relationship(
+        "LibraryFileQuestion",
+        back_populates="library_file",
+        cascade="all, delete-orphan"
+    )
+
+
+class LibraryFileQuestion(AuditBase):
+    library_file_id = Column(BigInteger, ForeignKey("library_file.id"), nullable=False)
+
+    type = Column(String(45), nullable=False)
+    question = Column(Text, nullable=False)
+    options = Column(JSONB, nullable=False)
+    answer = Column(JSONB, nullable=False)
+
+    library_file = relationship(
+        "LibraryFile",
+        back_populates="questions"
+    )
diff --git a/requirements.txt b/requirements.txt
index 15db8cd..754f81c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,4 +7,5 @@ langchain~=1.3.14
 langchain-core~=1.5.1
 langchain-openai~=1.4.1
 starlette~=1.3.1
-pydantic~=2.13.4
\ No newline at end of file
+pydantic~=2.13.4
+SQLAlchemy~=2.0.51
\ No newline at end of file
diff --git a/models/agent.py b/schemas/agent.py
similarity index 100%
rename from models/agent.py
rename to schemas/agent.py
diff --git a/schemas/library.py b/schemas/library.py
new file mode 100644
index 0000000..8e5d9dc
--- /dev/null
+++ b/schemas/library.py
@@ -0,0 +1,37 @@
+from datetime import datetime
+
+from pydantic import BaseModel
+from typing import List
+
+
+class QuestionRequest(BaseModel):
+    type: str
+    question: str
+    options: List[str]
+    answer: List[str]
+
+
+class QuestionResponse(QuestionRequest):
+    id: int
+
+    class Config:
+        from_attributes = True
+
+
+class LibraryFileRequest(BaseModel):
+    subject: str
+    module: str
+    name: str
+    size: int
+    type: str
+
+    questions: List[QuestionRequest] = []
+
+
+class LibraryFileResponse(LibraryFileRequest):
+    id: int
+    uploadTime: str
+    questions: List[QuestionResponse] = []
+
+    class Config:
+        from_attributes = True
diff --git a/service.py b/service/agent_service.py
similarity index 94%
rename from service.py
rename to service/agent_service.py
index 230476f..f19e5d8 100644
--- a/service.py
+++ b/service/agent_service.py
@@ -1,7 +1,7 @@
 from langchain_core.messages import AIMessageChunk, HumanMessage
 
 from agent.study import study_agent
-from models.agent import QueryRequest
+from schemas.agent import QueryRequest
 
 
 def query_agent(query: QueryRequest):
diff --git a/service/library_service.py b/service/library_service.py
new file mode 100644
index 0000000..4346417
--- /dev/null
+++ b/service/library_service.py
@@ -0,0 +1,85 @@
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy.orm import selectinload
+
+from models.library import LibraryFile, LibraryFileQuestion
+from schemas.library import LibraryFileRequest, LibraryFileResponse, QuestionResponse
+
+
+async def add_file(db: AsyncSession, data: LibraryFileRequest) -> bool:
+    """
+    创建题库文件及其题目
+    """
+    file = LibraryFile(
+        subject=data.subject,
+        module=data.module,
+        name=data.name,
+        size=data.size,
+        type=data.type
+    )
+
+    db.add(file)
+    await db.flush()
+
+    for q in data.questions:
+        question = LibraryFileQuestion(
+            library_file_id=file.id,
+            type=q.type,
+            question=q.question,
+            options=q.options,
+            answer=q.answer
+        )
+        db.add(question)
+
+    await db.commit()
+
+    return True
+
+
+async def get_file(db: AsyncSession, file_id: int) -> LibraryFileResponse:
+    stmt = (
+        select(LibraryFile)
+        .options(selectinload(LibraryFile.questions))
+        .where(LibraryFile.id == file_id)
+    )
+    result = await db.execute(stmt)
+    file = result.scalar_one_or_none()
+
+    return LibraryFileResponse(
+        id=file.id,
+        subject=file.subject,
+        module=file.module,
+        name=file.name,
+        type=file.type,
+        size=file.size,
+        uploadTime=file.create_time.strftime("%Y-%m-%d %H:%M:%S"),
+        questions=[
+            QuestionResponse(
+                id=q.id,
+                type=q.type,
+                question=q.question,
+                options=q.options,
+                answer=q.answer,
+            )
+            for q in file.questions
+        ],
+    )
+
+
+async def list_files(db: AsyncSession) -> list[LibraryFileResponse]:
+    stmt = select(LibraryFile).order_by(LibraryFile.create_time.desc())
+    files = (await db.execute(stmt)).scalars().all()
+
+    return [
+        LibraryFileResponse(
+            id=f.id,
+            subject=f.subject,
+            module=f.module,
+            name=f.name,
+            type=f.type,
+            size=f.size,
+            uploadTime=f.create_time.strftime("%Y-%m-%d %H:%M:%S"),
+            questions=[],
+        )
+        for f in files
+    ]
diff --git a/utils/common.py b/utils/common.py
new file mode 100644
index 0000000..bb599fe
--- /dev/null
+++ b/utils/common.py
@@ -0,0 +1,13 @@
+import re
+
+
+def camel_to_snake(name: str) -> str:
+    """将驼峰命名转换为蛇形命名（CamelCase → snake_case）"""
+    name = re.sub('(.)([A-Z][a-z]+)', r'\1_\2', name)
+    return re.sub('([a-z0-9])([A-Z])', r'\1_\2', name).lower()
+
+
+def snake_to_camel(name: str) -> str:
+    """将蛇形命名转换为驼峰命名（snake_case → CamelCase）"""
+    components = name.split('_')
+    return ''.join(x.title() for x in components)