In the process of organic fertilizer production, organic fertilizer granulator is a key equipment, and its running state directly affects the quality and production efficiency of fertilizer. Therefore, regular maintenance and maintenance of organic fertilizer granulator is very important. This paper will focus on the Fertilizer Granules Compaction Machine,Flat-Die Pellet Machine,Rotary Drum Granulator,Disc Granulator these four common fertilizer granulator, share some practical maintenance skills.