After ozone is dissolved in water, ozone water can quickly kill bacteria,fungus,escherichia coli,viruses and other microorganisms and it also can oxidize oganic matter completely with high oxidative capacity. it can achieve disinfection,sterilization,deodorization and prevention of infectious diseases spread by ozone oxidatio to swimming pool water,at the same time,ozone can oxidize iron,manganese and other metal ions in water and decompose micro organism of scattered ray in the water to improce water clarity and make water to show a beautiful blue color. the use of ozone treatment for swimming pool water is currently widely used in the world. ozone treatment could ensure the water quality to reach the international swimming federation standard and can not be replaced by other disinfection methods.