Miniature grinding machine is suitable for heavy crystal stone, quartz stone, potassium long stone, talc, marble, limestone, ceramic, glass and other Mohs hardness not greater than 7 degrees, humidity in less than 6% non-flammable explosive mining, chemical, building materials, metallurgy and other industries of more than 280 kinds of powder processing, finished particle size in 100 - 425 mesh range arbitrarily adjusted.