The invention relates to an
underwater lamp with protective and cleaning functions. The
underwater lamp comprises a
lamp shell, a support and a base and further comprises a protective mechanism and acleaning mechanism, the protective mechanism comprises a water pump, a first driving component, two transmission components, two water proof hoods and two second supporting rods, the cleaning mechanism comprises a roller
brush, two second driving components, two moving components, two guide rails, two fourth gears and two third supporting rods, and the first driving component comprises a first motor, a first gear, two second gears, two screw rods, two first supporting rods and two driving blocks. According to the
underwater lamp with the protective and cleaning functions, by means of the protective mechanism, the time for the underwater lamp being soaked in water is shortened, so that the aging speed of the underwater lamp is slowed down, and the
failure rate of the underwater lamp is reduced; and by means of the cleaning mechanism, the underwater lamp is cleaned, the surface of the underwater lamp can be kept clean, the
irradiation effect of the underwater lamp is improved, and the speed of the underwater lamp being corroded is reduced.