This ball mill is horizontal type and tubular running device, has two warehouses. This machine is grid type and its outside runs along gear. The materials enters spirally and evenly the first warehouse of the milling machine along the input material hollow axis by input material device. In this warehouse, there is a ladder scaleboard or ripple scaleboard, and different specifications steel balls are installed on the scaleboard, when the barrel body rotates and then produces centrifugal force. At this time, the steel ball is carried to some height and falls to make the material grinding and striking.