Agricultural tractors are equipped with buckets, including trailers and trailers. The hopper is surrounded by a front high bar, a rear carriage plate, left and right carriage plates and a bottom plate. Some are equipped with a pair of wheels, and some are equipped with two pairs of wheels. The problem with this kind of hopper is its small size, which is only suitable for carrying heavy goods, such as grain, soil and stones. For lighter agricultural products, such as crop straws and firewood, the weight of the hopper is too small, which increases the transportation cost.