High pressure roller mill is used in mineral industry, building industry, chemical industry and metallurgy industry. It is used for high fineness production of more than 400 kinds of non flammable and non explosive materials of Mohs hardness less than 9.3 richter scale, humidity below 6%, such as quartzite, feldspar, barite, fluorite, dolomite, garnet, carborundum, bauxite, zircon sand, marble, calcite, iron ore, phosphate ore, coal briquette, ceramic, slags, etc. The final product particle size can be adjustable between 30 and 425 meshes.