The working process of the energy-saving ball mill is smaller, and the start-up resistance generated by the load-bearing cylinder is small, and it is easy to start. The load pressure, comminution and milling efficiency in the main shaft direction are in the same time, suitable for operation at higher speed and energy density, can achieve higher grinding efficiency and lower unit energy consumption. The cylinder is high-speed rotation, the outer circle speed can reach 15 m / s, drive the internal medium centrifugal movement, will graft grade step by step along the axial direction, and the feed end is mainly sealed from the mechanical seal to the sealing slurry. Dynamic media separation mechanism is discharged, the material and medium are separated, and the medium is prevented from escape. The energy-saving ball mill is contrast with the ordinary ball mill of the same installed power, and the energy input density of the energy-saving ball mill reaches 75 times that of the ordinary ball mill, and the area area is only equal to one tenth of the ball mill.