Rubber products are very common in people's life, and the demand is gradually expanding with the development of the national economy. In order to extend the service life of these rubber products, it is necessary to enhance its aging resistance, wear resistance, high and low temperature resistance, acid and alkali resistance, insulation and other properties, to do this, it is absolutely not less the help of reinforcing agent. Reinforcing agent is an important category in rubber additives, main have mechanical properties and resistance to aging of rubber reinforcing effect, the performance of precipitated silica is one of the representative, usually white with a white powder or granular, nontoxic and high specific surface area, stable property, high dispersion, good electrical insulation, high temperature resistant, insoluble in common acid, etc. In general, the reinforcing effect of precipitated silica is enhanced by small particle size and large specific surface area. Because the molecular chain of the adhesive material usually exists in an irregular state, showing high tensile force and tear resistance, when the reinforcing agent is mixed into the adhesive material, the molecular chain of the adhesive material is attached to the surface of the reinforcing agent, and some elongation is lost in order to make the particles become orderly. Precipitated silica has a large specific surface area and surface activity, so it can make the molecular chain of rubber as effective adhesion, to achieve the maximum reinforcing effect. However, although precipitated white carbon black is good, it can not be used directly. The synthesis process of precipitated white carbon black is essentially the process of transforming the dense crystalline quartz sand into loose amorphous hydrated silica, namely SiO2→SiO2·nH2O. The surface of precipitated white carbon black eventually generated will contain a large number of silicon hydroxyl groups, which have high activity. As a result, the surface of silica is hydrophilic, the dispersion is poor, and the particles are easy to agglomerate, which affects its application in polymer matrix. Therefore, in order to broaden the application field, it is necessary to conduct hydrophobic modification of white carbon black, reduce the content of silicon hydroxyl group, and enhance its dispersion in organic materials.