Belt dryer is a kind of continuous production drying equipment, the main heating way has electric heating, steam heating, hot air heating, it’ s main working principle is to spread the material evenly in the network, the transmission device drive the belt move inside dryer cylinder, the hot air from the bottom of dryer machine enter into the dryer, rise step by step, the water vapor will be discharge through the dehumidity hole, so as to achieved the purpose of drying.