Install steel rails on the operating vehicle. During work, the transport vehicle is placed on the steel rail, and a set of walking mechanisms provides power to drive the driving wheel group forward. When in place, the box pushing mechanism pushes the sand box onto the transport vehicle. The operation vehicle is controlled by the production line operation program and automatically completes the operation. When it is in place, it automatically stops, and the sand box drives off the transportation vehicle and enters the corresponding transportation line. The active motor automatically adjusts frequency through a frequency converter, which can automatically complete acceleration and deceleration. Electromagnetic brake with accurate parking position.