Single-side light-emitting wavelength-selectable ultraviolet lamp module

The invention provides a single-side light-emitting wavelength-selectable ultraviolet lamp module, which comprises an ultraviolet lamp body, the ultraviolet lamp body is a cylindrical lamp body and comprises a first electrode arranged on an arc surface of the cylindrical lamp body and a planar light-emitting surface arranged on one side of the arc surface, a filtering layer is arranged on the outer surface of the planar light-emitting surface, and a second electrode is arranged on the outer surface of the filtering layer. The ultraviolet lamp further comprises a second electrode arranged in the middle of the cylindrical lamp body, the second electrode and the first electrode are coaxially arranged, the arc face and the other side opposite to the plane light-emitting face are provided with ultraviolet reflecting layers, and the ultraviolet lamp body is filled with inert gas for light emitting. The first electrode and the second electrode excite inert gas to emit ultraviolet rays, the ultraviolet rays are emitt