diff --git a/apps/backend/src/db/migrations/114_template_evidence_indexes.sql b/apps/backend/src/db/migrations/114_template_evidence_indexes.sql
new file mode 100644
index 00000000..1fd81d02
--- /dev/null
+++ b/apps/backend/src/db/migrations/114_template_evidence_indexes.sql
@@ -0,0 +1,17 @@
+-- 114_template_evidence_indexes.sql
+-- 接单模板初始化预览：按订单日期筛 30 天，再按订单项取 SKU 证据。
+-- 测试库 40 万订单项时缺索引会到 40 秒；两个索引把预览降到秒级。
+
+CREATE INDEX IF NOT EXISTS idx_orders_basis_date
+  ON orders (((COALESCE(paid_at, created_at) AT TIME ZONE 'Asia/Shanghai')::date));
+
+CREATE INDEX IF NOT EXISTS idx_order_items_order_sku_cover
+  ON order_items (order_id) INCLUDE (id, sku_code, sku_name);
+
+COMMENT ON INDEX idx_orders_basis_date IS
+  '模板初始化/时间筛选：按 Asia/Shanghai 订单日期过滤，避免全表扫 orders';
+COMMENT ON INDEX idx_order_items_order_sku_cover IS
+  '模板初始化的 SKU 证据覆盖索引，避免回表取 sku_code/sku_name';
+
+ANALYZE orders;
+ANALYZE order_items;