diff --git a/docker/hyf_backend/initdb/02-init-admin-user.sql b/docker/hyf_backend/initdb/02-init-admin-user.sql
new file mode 100644
index 0000000..c4a08d2
--- /dev/null
+++ b/docker/hyf_backend/initdb/02-init-admin-user.sql
@@ -0,0 +1,41 @@
+-- 初始化 admin 用户
+-- 注意：此脚本假设 users 表已经通过 alembic 迁移创建
+
+-- 插入默认 admin 用户（如果不存在）
+INSERT INTO users (
+  id,
+  username,
+  email,
+  hashed_password,
+  full_name,
+  is_active,
+  avatar_url,
+  bio,
+  created_at,
+  updated_at,
+  created_by,
+  updated_by
+)
+VALUES (
+  1,
+  'admin',
+  'admin@example.com',
+  '$2b$12$H0YpUrwCCuTISE3D2dQO/uxnBupCf207v1.SFjiAVoCGjkVhK65ou',
+  'Admin',
+  true,
+  NULL,
+  NULL,
+  NOW(),
+  NOW(),
+  NULL,
+  NULL
+)
+ON CONFLICT (id) DO NOTHING;
+
+-- 如果 username 有唯一约束，也可以使用：
+-- ON CONFLICT (username) DO NOTHING;
+
+-- 验证插入结果
+SELECT id, username, email, full_name, is_active, created_at
+FROM users
+WHERE username = 'admin';
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