Fumed silica is particularly important, one of the high-tech superfine inorganic new materials due to its small particle size, specific surface area is big, therefore the surface adsorption power, surface energy, high chemical purity, good dispersion performance, heat resistance, resistance has specific performance, with its excellent stability, reinforcing, thickening and thixotropic, and unique features in the field of the academic disciplines, It has an irreplaceable effect. Gas phase method of silica commonly known as "fumed silica", is widely used in various industries as additive, catalyst carrier, petrochemical industry, decoloring agent, matting agent, rubber reinforcing agent, plastic filling agent, ink thickener, soft metal polishing agent, insulation insulation filler, senior daily cosmetics packing and spraying materials, medicine, environmental protection and other fields. And for the development of related industrial fields to provide new material foundation and technical guarantee. Compared with conventional materials, it shows special properties in magnetism, catalysis, light absorption, thermal resistance and melting point, so it has been paid much attention.