Hammer crusher adopts high-speed impact hammer and crushed materials. It has the characteristics of simple structure, high breaking rate, high production efficiency and need to be broken. It can be used for both dry and wet crushing. It is suitable for mining, cement, coal, metallurgy and building materials. Medium hardness and brittle materials are moderately broken in sectors such as roads and fuels. The device can adjust the gap between the hammer and the purlin according to the user's requirements, change the granularity, and meet the different needs of different users.