A quad steer trailer is a tool for transporting goods at airports, port transportation, shipbuilding, stations, and factories. It uses traction vehicles, power fronts, forklifts and tractors as traction power. Due to the relatively small working space, quad steer trailers with small vehicle volume and many tractions are required to keep the vehicle body stable during work, flexible driving, overall steering radius, and steering accuracy requirements, to smoothly approach the processing site or avoid other equipment. At the same time, its reliability, safety, and flexibility are also required. In the design of quad steer trailers, the steering mechanism, wheel pressure and frame rigidity are the design priorities; comprehensive and comprehensive consideration of practical performance and cost performance and an excellent product developed by the customer, accepted and recognized by customers.