The utility model discloses a white light LED lighting device, which comprises a casing, a white light LED light source and a light-sending plate, wherein the light-sending plate is used to seal a white light LED into a housing space of the casing, at least one ultraviolet light source is arranged in the white light LED lighting device, a layer of photo-catalytic material is arranged on one side of the light-sending plate which is exposed on outside the lighting device, the ultraviolet light source is arranged towards the light-sending direction, and the ultraviolet lights emitted by the ultraviolet light source are illuminated on the photo-catalytic material.