Ultraviolet disinfection device for sewage treatment

The utility model discloses an ultraviolet disinfection device for sewage treatment, which comprises a lapping plate, a plurality of ultraviolet disinfection devices, a plurality of ultraviolet disinfection devices and a plurality of ultraviolet disinfection devices, the concave frame is fixedly mounted at the bottom end of the butt strap; the multiple lamp holders are arranged on the left side and the right side of an inner cavity of the concave frame correspondingly; the ultraviolet lamp is arranged on the inner side of the lamp holder; the two sliding blocks are fixedly mounted on the left side and the right side of the concave frame correspondingly; and the two supporting plates are arranged on the left side and the right side of the inner cavity of the butt strap correspondingly, and the upper surfaces of the supporting plates are attached to the butt strap. The ultraviolet disinfection device for sewage treatment can ensure that an ultraviolet lamp stably and vertically moves up and down to be mounted a