This product is mainly used in the field of aluminum processing and is an important part of the logistics and transportation system of aluminum coil processing. The trolley includes a mother trolley, a first conveyor for supporting and transporting the hoses, and a saddle main trolley and an additional trolley for lifting and transporting the coil. The workshop is equipped with walkways corresponding to the above-ground warehouse and each rolling mill. The trolley is used to transport the aluminum coils in the workshop to the buffer rack and transport the aluminum coils on the buffer rack to the second conveyor. This product uses the frequency limit lifting method to ensure positioning accuracy when running at high speed. This product overcomes the barriers between delivery and receipt of finished products, providing customers with the convenience of digital control of product storage, receipt and output, and significantly reducing manual input and output time.