Tractor trucks refer to trucks that are specifically or mainly used to tow trailers, and can usually be divided into types such as semi trailer traction trucks and full trailer traction trucks. The rear of the semi trailer tractor truck is equipped with a traction seat, which is used to tow and support the front end of the semi trailer. The fully trailer tractor truck itself comes with a trunk, and although its appearance is similar to that of a truck, its vehicle length and wheelbase are short, and there is a towing hook at the rear.