Nano-high purity silicon grinding particles are the most important components of polishing liquid, which act on the surface of the material to be machined through micro-cutting and rolling in the polishing process to achieve the role of mechanical removal of material. Nano high purity silicon is a silica sol abrasive particle prepared by water glass as raw material. Dinglong has independently developed nano-high purity silicon grinding particles with high purity, narrow particle size distribution and high removal efficiency, which realizes the independent control of the core raw materials of polishing liquid.