diff --git a/src/server/routes/mileage/vehicle-info.ts b/src/server/routes/mileage/vehicle-info.ts
new file mode 100644
index 0000000..30e8dfe
--- /dev/null
+++ b/src/server/routes/mileage/vehicle-info.ts
@@ -0,0 +1,46 @@
+import pool from '../../db.js';
+import type { VehicleInfoRow } from './types.js';
+
+/** 车辆关联信息 SQL（客户名、部门、经理、租赁状态、主体、项目） */
+export const VEHICLE_INFO_SQL = `SELECT
+    truck.plate_number AS plate,
+    cus.customer_name AS customer,
+    dep.dep_name AS department,
+    u.user_name AS manager,
+    dic_status.dic_name AS rent_status,
+    org_truck.org_name AS entity,
+    c.project_name AS project
+FROM tab_truck truck
+LEFT JOIN tab_truck_status_info si ON si.truck_id = truck.id AND si.is_deleted = 0
+LEFT JOIN tab_contract c ON c.id = si.contract_id AND c.is_deleted = 0
+LEFT JOIN tab_customer cus ON cus.id = c.customer_id AND cus.is_deleted = 0
+LEFT JOIN tab_user u ON u.id = c.bd AND u.is_deleted = 0
+LEFT JOIN tab_department dep ON dep.id = u.dep_id AND dep.is_deleted = 0
+LEFT JOIN tab_dic dic_status ON dic_status.parent_code = 'dic_truck_rent_status'
+      AND dic_status.dic_code = truck.truck_rent_status AND dic_status.is_deleted = 0
+LEFT JOIN tab_org org_truck ON org_truck.id = truck.org_id AND org_truck.is_deleted = 0
+WHERE truck.is_deleted = 0 AND truck.is_operation = 1`;
+
+/** 查询所有车辆关联信息，返回 plate→info 的 Map */
+export async function fetchVehicleInfoMap(): Promise<Map<string, VehicleInfoRow>> {
+  const [rows] = await pool.execute(VEHICLE_INFO_SQL) as [VehicleInfoRow[], unknown];
+  const map = new Map<string, VehicleInfoRow>();
+  for (const row of rows) {
+    map.set(row.plate, row);
+  }
+  return map;
+}
+
+/** 查询指定车牌的关联信息 */
+export async function fetchVehicleInfoByPlates(plates: string[]): Promise<Map<string, VehicleInfoRow>> {
+  if (plates.length === 0) return new Map();
+  const [rows] = await pool.execute(
+    `${VEHICLE_INFO_SQL} AND truck.plate_number IN (${plates.map(() => '?').join(',')})`,
+    plates
+  ) as [VehicleInfoRow[], unknown];
+  const map = new Map<string, VehicleInfoRow>();
+  for (const row of rows) {
+    map.set(row.plate, row);
+  }
+  return map;
+}