diff --git a/.gitignore b/.gitignore
index 4e7ca7c..bf76f76 100755
--- a/.gitignore
+++ b/.gitignore
@@ -7,6 +7,11 @@
 *.bak
 *.orig
 
+# 数据库文件
+*.db
+*.sqlite
+*.sqlite3
+
 # 环境变量与密钥
 .env
 .env.local
diff --git a/backend/database.py b/backend/database.py
index ae68e31..fa58cf2 100644
--- a/backend/database.py
+++ b/backend/database.py
@@ -1,7 +1,7 @@
 import sqlite3
 import os
 
-DB_PATH = os.path.join(os.path.dirname(__file__), "stock_data.db")
+DB_PATH = os.path.join(os.path.dirname(__file__), "data", "stock_data.db")
 
 SCHEMA_SQL = """
 CREATE TABLE IF NOT EXISTS stock_collections (
@@ -41,6 +41,7 @@ CREATE TABLE IF NOT EXISTS cache (
 
 
 def get_connection() -> sqlite3.Connection:
+    os.makedirs(os.path.dirname(DB_PATH), exist_ok=True)
     conn = sqlite3.connect(DB_PATH)
     conn.row_factory = sqlite3.Row
     conn.execute("PRAGMA foreign_keys = ON")
@@ -48,6 +49,13 @@ def get_connection() -> sqlite3.Connection:
 
 
 def init_db():
+    # 迁移旧版 DB（backend/stock_data.db → backend/data/stock_data.db）
+    old_path = os.path.join(os.path.dirname(__file__), "stock_data.db")
+    if os.path.exists(old_path) and os.path.isfile(old_path):
+        import shutil
+        shutil.move(old_path, DB_PATH)
+        print(f"[database] 已迁移 stock_data.db → data/stock_data.db")
+
     conn = get_connection()
     conn.executescript(SCHEMA_SQL)
 
diff --git a/backend/stock_data.db b/backend/stock_data.db
deleted file mode 100644
index 156f1ff..0000000
Binary files a/backend/stock_data.db and /dev/null differ
diff --git a/docker-compose.yml b/docker-compose.yml
index 15655da..77af30a 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -7,3 +7,8 @@ services:
     env_file:
       - .env
     restart: unless-stopped
+    volumes:
+      - auv_data:/app/data
+
+volumes:
+  auv_data: