HZG rotary drum dry machine is subject slightly tilt and can in must range within can adjustable speed of cylinder body, wet material by feeding machine into cylinder within, in within tube are cloth of copy Board device flip Xia, material in dry device within uniform distribution and dispersed and and through tube within of hot air (and flow or upstream) full contact, accelerated has dry heat, biography mass. So as to achieve the purpose of drying. The equipment can be a variety of flights to adjust to the different material, simple structure, reliable operation.