Recently, disinfection drugs used at home and abroad for disinfection of swimming pools are mainly liquid chlorine, calcium hypochlorite, chlorinated isocyanuric acid compounds, sodium hypochlorite, ozone and chlorine dioxide. Liquid chlorine has strong sterilization ability and is a more sophisticated disinfectant. However, liquid chlorine is used as a disinfectant, and secondary pollution to the human body and the environment is also obvious. Calcium hypochlorite is a powerful sterilizing agent and algaecide. The available chlorine content is 65%, which is convenient to use. The calcium hypochlorite tablet can be placed in the active applicator, or formulated into a 1-2% solution and then metered into the pool water by a metering pump, generally used for "superchlorination" disposal of the pool.