Rotary coating machine is designed by our company’s scientific research department to solve the problem of stacking, rewetting and agglomeration of granular fertilizer. Rotary coating machine is composed of agitating tank, host machine and so on. The machine adopts a special liquid raw material or a spraying process combined with solid powder, which can form a protective film on the surface of the compound fertilizer particles and isolate it from the air, thereby effectively preventing the salt bridge and moisture absorption on the fertilizer surface. At the same time, the surface brightness of the particles is also improved, and some trace elements can be added appropriately to improve the fertilizer efficiency. It can also prolong the fertilizer effective period in the soil and effectively improve the compound fertilizer performance. The main unit adopts polypropylene lining or acid-resistant stainless steel, which is anticorrosive and durable.