emphasis on technology itself on the adaptability and stability of the effluent water quality changes. With the high speed of China's social and economic development, environmental issues increasingly prominent, especially the urban water environment deterioration, aggravated the shortage of water resources, affecting people's physical and mental health, has become a serious restriction factor of urban sustainable development. In recent years, state and local government attaches great importance to the sewage treatment projects, automatic backwash filters with unprecedented speed to facilitate the construction of urban sewage treatment project. In this process, urban sewage on automatic self-cleaning filter process optimization principle, will be the top issue facing the engineering.