diff --git a/backend/migrations/2026_01_29_141059_convert_order_items_to_hypertable.php b/backend/migrations/2026_01_29_141059_convert_order_items_to_hypertable.php
new file mode 100644
index 0000000..ea86fac
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+++ b/backend/migrations/2026_01_29_141059_convert_order_items_to_hypertable.php
@@ -0,0 +1,96 @@
+<?php
+
+use Hyperf\Database\Schema\Schema;
+use Hyperf\Database\Migrations\Migration;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * 将 order_items 表转换为 TimescaleDB hypertable
+     *
+     * 依赖：
+     * - 2026_01_29_141057_add_created_date_to_order_items_table.php
+     * - 2026_01_29_141058_convert_orders_to_hypertable.php
+     *
+     * 注意事项：
+     * 1. Hypertable 要求主键和唯一约束必须包含分区键 (created_date)
+     * 2. 数据完整性（与 orders 的关联）需在应用层保证
+     */
+    public function up(): void
+    {
+        // 1. 删除原有的主键约束
+        Schema::getConnection()->statement('ALTER TABLE order_items DROP CONSTRAINT order_items_pkey');
+
+        // 2. 删除原有的唯一约束
+        Schema::getConnection()->statement('ALTER TABLE order_items DROP CONSTRAINT order_items_order_sub_order_unique');
+        Schema::getConnection()->statement('ALTER TABLE order_items DROP CONSTRAINT order_items_store_platform_sub_unique');
+
+        // 3. 创建新的复合主键（包含分区键）
+        Schema::getConnection()->statement('ALTER TABLE order_items ADD PRIMARY KEY (id, created_date)');
+
+        // 4. 转换为 hypertable（按年分区，与 orders 保持一致）
+        Schema::getConnection()->statement("
+            SELECT create_hypertable('order_items', 'created_date',
+                chunk_time_interval => INTERVAL '1 year',
+                migrate_data => true
+            )
+        ");
+
+        // 5. 创建新的唯一约束（包含分区键）
+        Schema::getConnection()->statement('
+            ALTER TABLE order_items ADD CONSTRAINT order_items_order_sub_order_unique
+            UNIQUE (order_id, sub_order_id, created_date)
+        ');
+
+        Schema::getConnection()->statement('
+            ALTER TABLE order_items ADD CONSTRAINT order_items_store_platform_sub_unique
+            UNIQUE (store_id, platform_order_id, sub_order_id, created_date)
+        ');
+
+        // 6. 创建复合索引（支持按公司+时间查询）
+        Schema::getConnection()->statement('
+            CREATE INDEX idx_order_items_company_created
+            ON order_items (company_id, created_date DESC)
+        ');
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * 警告：回滚 hypertable 会丢失分区结构，数据会保留但需要手动处理
+     */
+    public function down(): void
+    {
+        // 1. 创建临时表
+        Schema::getConnection()->statement('
+            CREATE TABLE order_items_temp AS SELECT * FROM order_items
+        ');
+
+        // 2. 删除 hypertable
+        Schema::getConnection()->statement('DROP TABLE order_items');
+
+        // 3. 重命名临时表
+        Schema::getConnection()->statement('ALTER TABLE order_items_temp RENAME TO order_items');
+
+        // 4. 重建原有约束
+        Schema::getConnection()->statement('ALTER TABLE order_items ADD PRIMARY KEY (id)');
+        Schema::getConnection()->statement('
+            ALTER TABLE order_items ADD CONSTRAINT order_items_order_sub_order_unique
+            UNIQUE (order_id, sub_order_id)
+        ');
+        Schema::getConnection()->statement('
+            ALTER TABLE order_items ADD CONSTRAINT order_items_store_platform_sub_unique
+            UNIQUE (store_id, platform_order_id, sub_order_id)
+        ');
+
+        // 5. 重建序列（如果需要）
+        Schema::getConnection()->statement("
+            SELECT setval('order_items_id_seq', (SELECT MAX(id) FROM order_items))
+        ");
+
+        // 6. 删除 created_date 索引（字段保留，可在下一个回滚中删除）
+        Schema::getConnection()->statement('DROP INDEX IF EXISTS idx_order_items_company_created');
+    }
+};