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'
+    )
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