Wet material via special machine shop, the uniform paving speed of the stainless steel mesh belt (belt balance by folding net, made of SUS304 stainless steel, meet the requirements of food grade, long service life, bearing) mesh belt in motor speed drag forward moving into the drying chamber. The drying chamber is composed of several units, each unit of hot air circulation, temperature independent adjustable, moist air is discharged by the special fan (humidity control, air quantity) in circulating fan guided by a heat exchanger after heating, from the top down through the air distributing plate, complete the heat and mass transfer process with the material, take away the water in the material. The drying chamber provided with a plurality of turning device, so that all material contact with the hot air, improve the uniformity of drying effect. Fall into the material collector continuously finished product after drying.