The 7CX-8 ton European style double axle four-wheel high box board self dumping trailer is an agricultural vehicle that is towed by a tractor to transport materials, also known as an agricultural trailer. It is an important mechanized transportation method in agricultural production. Small wheeled or hand-held tractors pull small trailers for short distance or field transportation, meeting the needs of small-scale agricultural production and operation. Transporting grain, agricultural materials, etc. by towing trailers with large and medium-sized wheeled tractors can fully utilize the role of tractors and meet the needs of large-scale agricultural production and operation.