In order to achieve four rub the tube work the uniformity, the type of drive uses the gear drive. In a bull wheel, the even cloth four size same pinions, big, the pinion modulus is being all around same, the number of teeth is two time of relations, is constituting the planet gear train together, realizes the revolution, the rotation request. Because is the vertical ball mill, the electrical machinery also needs the vertical structure, therefore fixes the electric motor in the outer covering, and transmits through the belt transmission the torque the planet gear train, again rubs the tube through the planet gear train realization revolving. Moreover, the outer covering with screw retention on the foundation, works in the machine, again uses a cover the machine effective range to cover.