The hard rock crusher breaks up materials through the collision of the fast-rotating ram and materials. It has the simple structure, big crushing ratio, and high production efficiency, which can make two forms of breaking up: dry and wet. It is suitable for secondary and fine crushing of materials of medium hardness and brittle materials in departments like mine, cement, coal, metallurgy, construction, highway, burning, etc. This equipment can adjust to the cleft and the discharging granularity as the customers request to satisfy different needs of different customers.