diff --git a/Merge/back_trm/app/models/__init__.py b/Merge/back_trm/app/models/__init__.py
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+++ b/Merge/back_trm/app/models/__init__.py
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+from sqlalchemy.ext.declarative import declarative_base
+
+Base = declarative_base()
+
+# 先定义好 Base，再把所有 model import 进来，让 SQLAlchemy 一次性注册它们
+from .users import User
+from .topics import Topic
+from .post   import Post
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diff --git a/Merge/back_trm/app/models/__pycache__/users.cpython-310.pyc b/Merge/back_trm/app/models/__pycache__/users.cpython-310.pyc
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diff --git a/Merge/back_trm/app/models/post.py b/Merge/back_trm/app/models/post.py
new file mode 100644
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+++ b/Merge/back_trm/app/models/post.py
@@ -0,0 +1,111 @@
+from .users import User
+from . import Base
+
+from sqlalchemy import (
+    Column, Integer, String, Text, JSON, Enum,
+    TIMESTAMP, ForeignKey, Index, func, text
+)
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import relationship
+
+
+class Post(Base):
+    __tablename__ = 'posts'
+    __table_args__ = (
+        # 索引
+        Index('idx_posts_heat', 'heat'),
+        # MySQL 引擎、字符集、校对规则、表注释
+        {
+            'mysql_engine': 'InnoDB',
+            'mysql_charset': 'utf8mb4',
+            'mysql_collate': 'utf8mb4_general_ci',
+            'comment': '内容帖子表'
+        }
+    )
+
+    def to_dict(self):
+        return {
+            'id': self.id if self.id else None,
+            'user_id': self.user_id if self.user_id else None,
+            'topic_id': self.topic_id if self.topic_id else None,
+            'type': self.type if self.type else None,
+            'title': self.title if self.title else None,
+            'content': self.content if self.content else None,
+            'media_urls': self.media_urls if self.media_urls else None,
+            'status': self.status if self.status else None,
+            'heat': self.heat if self.heat else None,
+            'created_at': self.created_at.isoformat() if self.created_at else None,
+            'updated_at': self.updated_at.isoformat() if self.updated_at else None
+        }
+
+
+    id = Column(
+        Integer,
+        primary_key=True,
+        autoincrement=True,
+        comment='帖子ID'
+    )
+    user_id = Column(
+        Integer,
+        ForeignKey('users.id', ondelete='CASCADE'),
+        nullable=False,
+        index=True,
+        comment='作者ID'
+    )
+    topic_id = Column(
+        Integer,
+        ForeignKey('topics.id', ondelete='SET NULL'),
+        nullable=True,
+        index=True,
+        comment='所属话题ID'
+    )
+    type = Column(
+        Enum('text', 'image', 'video', 'document', name='post_type'),
+        nullable=False,
+        server_default=text("'text'"),
+        comment='内容类型'
+    )
+    title = Column(
+        String(255),
+        nullable=False,
+        comment='标题'
+    )
+    content = Column(
+        Text,
+        nullable=False,
+        comment='正文内容'
+    )
+    media_urls = Column(
+        JSON,
+        nullable=True,
+        comment='媒体资源URL数组'
+    )
+    status = Column(
+        Enum('draft', 'pending', 'published', 'deleted', 'rejected', name='post_status'),
+        nullable=False,
+        server_default=text("'draft'"),
+        comment='状态'
+    )
+    heat = Column(
+        Integer,
+        nullable=False,
+        server_default=text('0'),
+        comment='热度值'
+    )
+    created_at = Column(
+        TIMESTAMP,
+        nullable=True,
+        server_default=func.current_timestamp(),
+        comment='创建时间'
+    )
+    updated_at = Column(
+        TIMESTAMP,
+        nullable=True,
+        server_default=func.current_timestamp(),
+        onupdate=func.current_timestamp(),
+        comment='更新时间'
+    )
+
+    # 可选：与 User/Topic 模型的关系（需要在 User、Topic 中也定义 back_populates）
+    # user = relationship('User', back_populates='posts')
+    # topic = relationship('Topic', back_populates='posts')
diff --git a/Merge/back_trm/app/models/token.py b/Merge/back_trm/app/models/token.py
new file mode 100644
index 0000000..cbe864b
--- /dev/null
+++ b/Merge/back_trm/app/models/token.py
@@ -0,0 +1,27 @@
+from sqlalchemy import Column, Integer, String, DateTime, TIMESTAMP, Index
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.sql import func
+from datetime import datetime
+
+Base = declarative_base()
+
+class Token(Base):
+    __tablename__ = 'tokens'
+    
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    token = Column(String(255), nullable=False, unique=True)
+    expires_at = Column(DateTime, nullable=False)
+    created_at = Column(TIMESTAMP, default=func.current_timestamp())
+    updated_at = Column(TIMESTAMP, default=func.current_timestamp(), onupdate=func.current_timestamp())
+    
+    __table_args__ = (
+        Index('idx_token', 'token'),
+        Index('idx_expires_at', 'expires_at'),
+    )
+    
+    def __repr__(self):
+        return f"<Token(id={self.id}, token='{self.token[:10]}...', expires_at={self.expires_at})>"
+    
+    def is_expired(self):
+        """检查token是否已过期"""
+        return datetime.now() > self.expires_at
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diff --git a/Merge/back_trm/app/models/topics.py b/Merge/back_trm/app/models/topics.py
new file mode 100644
index 0000000..1a35a38
--- /dev/null
+++ b/Merge/back_trm/app/models/topics.py
@@ -0,0 +1,26 @@
+from . import Base
+from sqlalchemy import Column, Integer, String, Text, Enum, TIMESTAMP
+from sqlalchemy.sql import func
+
+class Topic(Base):
+    __tablename__ = 'topics'
+    __table_args__ = {
+        'mysql_engine': 'InnoDB',
+        'mysql_charset': 'utf8mb4',
+        'mysql_collate': 'utf8mb4_general_ci',
+        'comment': '话题/超话表'
+    }
+
+    id = Column(Integer, primary_key=True, autoincrement=True, comment='话题ID')
+    name = Column(String(100, collation='utf8mb4_general_ci'), nullable=False, unique=True, comment='话题名称')
+    description = Column(Text(collation='utf8mb4_general_ci'), comment='话题描述')
+    status = Column(
+        Enum('active', 'archived', name='topic_status', collation='utf8mb4_general_ci'),
+        default='active',
+        comment='状态'
+    )
+    created_at = Column(
+        TIMESTAMP,
+        server_default=func.current_timestamp(),
+        comment='创建时间'
+    )
\ No newline at end of file
diff --git a/Merge/back_trm/app/models/users.py b/Merge/back_trm/app/models/users.py
new file mode 100644
index 0000000..0505e86
--- /dev/null
+++ b/Merge/back_trm/app/models/users.py
@@ -0,0 +1,51 @@
+from . import Base
+from sqlalchemy import (
+    Column, Integer, String, Enum, TIMESTAMP, text
+)
+from sqlalchemy.ext.declarative import declarative_base
+
+
+class User(Base):
+    __tablename__ = 'users'
+
+    def to_dict(self):
+        return {
+            'id': self.id,
+            'username': self.username if self.username else None,
+            'email': self.email if self.email else None,
+            'avatar': self.avatar if self.avatar else None,
+            'role': self.role if self.role else None,
+            'bio': self.bio if self.bio else None,
+            'status': self.status if self.status else None,
+            'created_at': self.created_at.isoformat() if self.created_at else None,
+            'updated_at': self.updated_at.isoformat() if self.updated_at else None
+        }
+
+
+
+    id = Column(Integer, primary_key=True, autoincrement=True, comment='用户ID')
+    username = Column(String(50), nullable=False, unique=True, comment='用户名')
+    password = Column(String(255), nullable=False, comment='加密密码')
+    email = Column(String(100), nullable=False, unique=True, comment='邮箱')
+    avatar = Column(String(255), comment='头像URL')
+    role = Column(Enum('user', 'admin', 'superadmin', name='user_role'), comment='角色')
+    bio = Column(String(255), comment='个人简介')
+    status = Column(
+        Enum('active','banned','muted', name='user_status'),
+        nullable=False,
+        server_default=text("'active'"),
+        comment='账号状态'
+    )
+    created_at = Column(
+        TIMESTAMP,
+        nullable=True,
+        server_default=text('CURRENT_TIMESTAMP'),
+        comment='创建时间'
+    )
+    updated_at = Column(
+        TIMESTAMP,
+        nullable=True,
+        server_default=text('CURRENT_TIMESTAMP'),
+        onupdate=text('CURRENT_TIMESTAMP'),
+        comment='更新时间'
+    )
\ No newline at end of file