diff --git a/drizzle/0009_family-invite.sql b/drizzle/0009_family-invite.sql
new file mode 100644
index 0000000..60ebf37
--- /dev/null
+++ b/drizzle/0009_family-invite.sql
@@ -0,0 +1,11 @@
+-- xuchao: 家庭邀请码——家长生成一次性邀请码,其他家长凭码注册加入家庭。幂等。
+CREATE TABLE IF NOT EXISTS `family_invite` (
+	`id` bigint AUTO_INCREMENT NOT NULL,
+	`family_id` bigint NOT NULL,
+	`code_hash` varchar(64) NOT NULL,
+	`created_by` bigint NOT NULL,
+	`created_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
+	`expires_at` datetime NOT NULL,
+	`used_at` datetime,
+	CONSTRAINT `family_invite_id` PRIMARY KEY(`id`)
+);
\ No newline at end of file
diff --git a/drizzle/meta/_journal.json b/drizzle/meta/_journal.json
index 83dce88..950d3b7 100644
--- a/drizzle/meta/_journal.json
+++ b/drizzle/meta/_journal.json
@@ -64,6 +64,13 @@
       "when": 1786233600000,
       "tag": "0008_points",
       "breakpoints": true
+    },
+    {
+      "idx": 9,
+      "version": "5",
+      "when": 1786320000000,
+      "tag": "0009_family-invite",
+      "breakpoints": true
     }
   ]
 }
\ No newline at end of file
diff --git a/src/db/schema.ts b/src/db/schema.ts
index 29e623a..d5d4489 100644
--- a/src/db/schema.ts
+++ b/src/db/schema.ts
@@ -78,6 +78,21 @@ export const activationCodes = mysqlTable("activation_code", {
   usedAt: datetime("used_at"),
 });
 
+// ===== 家庭邀请码(家长生成,其他家长凭码注册加入;一次性,15 分钟)=====
+export const familyInvites = mysqlTable("family_invite", {
+  id: bigint("id", { mode: "number" }).primaryKey().autoincrement(),
+  familyId: bigint("family_id", { mode: "number" })
+    .notNull()
+    .references(() => families.id, { onDelete: "cascade" }),
+  codeHash: varchar("code_hash", { length: 64 }).notNull(),
+  createdBy: bigint("created_by", { mode: "number" })
+    .notNull()
+    .references(() => users.id),
+  createdAt: datetime("created_at").notNull().default(sql`CURRENT_TIMESTAMP`),
+  expiresAt: datetime("expires_at").notNull(),
+  usedAt: datetime("used_at"),
+});
+
 // ===== 周模板(每个孩子 × 每周几 × 每条任务)=====
 export const taskTemplates = mysqlTable(
   "task_template",