Vacuum technology as one of the core technologies of the solar photovoltaic industry, it is widely used in substrate manufacturing, film deposition and battery packaging and other processes, monocrystalline silicon polycrystalline silicon sintering furnace, vacuum for crystal pulling, mainly to prevent impurity pollution in the process of crystal pulling, and the reaction of other gases to improve the purity of crystal pulling. With the improvement of social awareness of the environment, the development of the new energy industry will become more and more powerful, and the solar photovoltaic industry will also achieve large-scale production.