The powder tank semi-trailer is mainly composed of two main components: the powder tank vehicle chassis and the special equipment for powder bulk transportation. The specific structural characteristics are as follows: The chassis, as the support and driving part of the vehicle, carries the weight of the entire vehicle and provides power. Special equipment for powder bulk transportation, additional power devices, including power take-off, additional transmission shaft, air compressor, etc., used to provide compressed air and other power. Tank assembly, the main part of the powder tank truck, is used to contain powder. The tank can be designed with different shapes and number of cabins as required. The tank is equipped with an air chamber and a fluidized bed to help fluidize and discharge the powder.