Van-type side dump Semi-trailer： The vehicle model and fence structure are combined with the user's cargo category, and the total design is sufficient to fully reduce the weight of the carriage under load conditions. The structure is simple and applicable, and easy to disassemble, reducing the investment cost for users and creating more extreme value. It adopts the combination of light high-strength steel and ordinary high-strength steel, and the longitudinal beam and the integral penetrating beam are assembled to form a space frame structure, which can balance the strength, rigidity, toughness and load-bearing capacity of the car without permanent deformation.