Agricultural trailers are agricultural vehicles that transport materials by tractor traction, also known as agricultural trailers, and are currently an important mechanized transportation method in rural China. Small wheeled or hand guided tractors pull small trailers for short distance or field transportation in rural areas, meeting the needs of small-scale agricultural operations. Transporting trailers on township, town, and rural roads by large and medium-sized wheeled tractors can fully utilize the role of tractors. The fuel consumption rate of tractor trailer transportation is lower or similar to that of automobile transportation on roads with poor road conditions, gravel roads, and dirt roads; On hard roads, it is higher than when transported by car.