Some special box style drier designed in accordance with the characteristics of different material and the requirement of customer, such as pigment, slice, film, sodium polyacrylate, vegetable, etc. Particularly drying material that contains high moisture or has low temperature. The equipment is designed in accordance with different requirement and characteristic, such as air in, air out, heat exchange, etc. It stands out the performance of special equipment: high output, low energy consumption, short time, convenient to operate and so on. The efficiency of equipment is raised greatly.