The carriage adopts the side-over and rear-over self-unloading mode. The frame and the longitudinal beam of the carriage are welded with high-quality manganese plates. The cargo box has two types: dustpan and rectangular. It has the characteristics of high strength, strong lifting force, good rigidity, toughness, strong carrying capacity, and no permanent deformation. These designs make the dump semi-trailer more durable and reliable.