Compared with traditional ball mill, the energy saving ball mill fan save power 18-25%, lubricant 70% and cooling water 90%, and comprehensively save energy above 20%. Regularly, it doesn't need to change the main shaft in 10 years, which will save much maintenance fee and labour hours. Main shaft lubrication uses grease, which is convenient and clean and prevents heavy metal pollution.This machine is made up of feeding part, discharging part, gyre part, transmission part, (decelerator, small transmission gear, generator, electrical control ) and so on. The hollow axis adopts the cast steel and the lining can replace , the rotating big gear processes in the way of casting rolling gear. The barrel body is wearable well and bears wearable scaleboard. This machine run steadily and works reliably