When a large number of swimmers swim at the same time, it means that the capacity of swimming pool filtration equipment must be improved to provide a clear, clean and comfortable swimming environment. Based on health considerations, swimming pools must be equipped with a s filtration system to ensure the healthy water quality. As we all know, in the filtration circulating, swimming pool sand filter is one of the important equipment for filtering and purifying water quality, which can effectively remove impurities in water.