Silane coupling agent was first developed as a glass fiber treatment agent for glass fiber reinforced plastics. The mechanical properties of reinforced plastics were significantly improved by silane coupling agent, which improved the adhesion between glass fiber and resin. With the rapid development of composite materials, silane coupling agent in both varieties and yield development rate is also very fast. In recent years, silane coupling agent is used to introduce specific functional groups into some materials, which can improve the surface properties of materials, and obtain anti-static, anti-mildew, anti-odor, anti-coagulation and physiological inertia, etc., which has become the beginning of new use of silane coupling agent. It is because of the development of many important application fields that silane coupling agent becomes an important branch of silicone.