Swimming pool disinfection device

The utility model discloses a swimming pool disinfection device which comprises a disinfection tank, the upper end of the disinfection tank is fixedly connected with a first shell, a sterilization mechanism used for disinfecting and sterilizing water is arranged in the first shell, and the sterilization mechanism comprises an annular plate connected to the inner wall of the disinfection tank in a sliding mode. The annular plate is fixedly connected with a plurality of mounting seats at equal intervals, quartz outer tubes are mounted on the mounting seats, ultraviolet sterilization lamps are arranged in the quartz outer tubes, and a driving mechanism for driving the annular plate to ascend and descend is arranged in the sterilization tank. The ultraviolet sterilization lamp is arranged, manpower and material resources for manual medicine throwing are saved, medicine residues are avoided, cost is reduced, human health is guaranteed, stirring blades are arranged, a water body makes full contact with ultraviolet