The drum dryer mainly consists of the feed seal head, the discharge seal head, the motor drive, the drum main engine and the supporting wheel base. The machine adopts the flowing and sealing drying process, the wet material containing water enters the dryer, and the material is evenly distributed in the drum dryer and fully contact the hot air in the drum dryer. The heat transfer is accelerated. During the drying process, the material is discharged from the finished product at the other end of the dryer, under the action of the tilting plate and hot air. It can run continuously, with fewer failures, lower maintenance cost, lower power consumption and higher output. It is widely used in various fertilizer production lines such as organic fertilizer, compound fertilizer, compost and so on.