Drum granulator is suitable for large-scale production of cold, hot granulation and high, medium and low concentration compound fertilizers. Special rubber lining or acid resistant stainless steel lining can be used in the barrel, which can automatically remove the scar and tumor. At the same time, the traditional scraper device is abolished. The machine has the characteristics of high granulating rate, high granule strength, beautiful appearance, simple operation, low energy consumption, corrosion resistance, long service life, uniform drying and convenient maintenance,etc. It is a mature granulation equipment solution in the industry.