Heating source for this dryer is gas. The air inlet temperature of hot gas can be about 150°-800° (which depends on the temperature resistance of the equipment and the heat sensitivity of the logistics). It is a kind of drying equipment that uses a variety of energy sources as heat source. It uses high temperature resistant steel mesh as the drying equipment for continuous drying of materials carried by the conveyor belt. As the conveyor belt is reticulated, it is suitable for drying a variety of regular or irregular blocky materials. The conveyor belt is made of SUS304 stainless steel. The conveyor belt moves back and forth in the dryer through a passage consisting of one or more heating units and is dragged by a transmission device. Each heating unit is equipped with air heating and circulation system, each channel has one or more dehumidification systems, when the conveyor belt passes, the hot air passes through the materials, and the water vapor is discharged from the dehumidification hole, so as to achieve the purpose of uniform drying. The length of the box is composed of standard sections. In order to save space, the dryer can be made into multilayer type, The length and width can be customized according to customer' requirement.