Ball Mill changes the intrinsic grinding machine structure. Its body and ground plank are an integral whole. So when fixing, it can be lowered on to a basal plane once only. Using biserial roller axletree with centripetal spherical support of the host axletree can reduce energy consumption by 30%.The intrinsic grille pattern forced discharging is substituted by the overfall pattern controlling one. This can improve the milled granularity and the capacity can be increased by 15-20%.