Planetary ball mill is a necessary device for mixing, fine grinding, sample preparation, nanomaterial dispersion, new product development and small batch production of high-tech materials. The product has small size, full function and high efficiency. It is the ideal equipment for scientific research units, colleges and universities, and enterprise laboratories to obtain microparticle research samples (four samples can be obtained at the same time in each experiment). The vacuum ball mill can be used to grind samples in vacuum state.