Car carrier semi-trailer loading position using fence structure design of semi-trailer. Mainly carrying cars, but also can carry vans, commercial vehicles, jeep and other passenger vehicles. The body for the rod, rack structure, light structure, light weight, mostly for the upper and lower two layer loading platform, the platform using hydraulic cylinder open, steel wire rope pulley structure, lifting smoothly, height multiple positioning advantages. The vehicle using the spreader structure, the frame as a whole bearing, no semi-trailer with longitudinal beam structure, light weight, weight is about 30% lighter than similar vehicles.Safe and convenient operation,all loading and unloading platform lifting control operation is reliable, can be clearly observed, accurate operation.It adopts a unique leaf spring downward suspension system, variable section plate spring, and good driving smoothness.