HS series tunnel dryer is on the basis of absorbing the foreign advanced drying technology on its own research and development of drying machine, it through the car loading material, make full use of the effective drying space, applicable to a variety of shapes of material drying. End of the whole machine is divided into a number of temperature humidity period, material in drying medium through the dry range, level, fluctuation interaction transformation, heat with steam boiler and hot blast stove (coal, oil, gas) and recycling, the platoon is wet, temperature adjustable, more convenient change drying technology, wider adaptability.