Pulverizer for pulverizing blocky fertilizer

The utility model relates to a pulverizer for pulverizing a blocky fertilizer, and belongs to the field of pulverizers. The pulverizer comprises a casing, rotating shafts and a roller, wherein one end of each rotating shaft is connected with the roller positioned in the casing; the other end, away from the roller, of each rotating shaft penetrates through the casing and is connected with an outside power device; the pulverizer further comprises a plurality of ladder-shaped hammer heads; the hammer heads are fixedly connected onto the roller; a plurality of protruding parts are also arranged on the roller, and are uniformly distributed on the roller. The pulverizer has the advantages that the structure is reasonable, the production efficiency is high, and the granularity is high.