Photovoltaic industry, referred to as PV, is a power generation system that uses solar energy to generate electricity, and is characterized by the application and development of silicon materials to form a photoelectric conversion into an industrial chain. Photovoltaic industry is increasingly becoming a fast-growing industry after T and microelectronics industry in the world. The development of the photovoltaic industry is of great significance to China's adjustment of energy structure, promotion of changes in energy production and consumption patterns, and promotion of ecological civilization.