The invention discloses an ultraviolet discharge lamp, which comprises a lamp tube, an output window, a first electrode, a second electrode, a ceramic tube, a first electrode holder and a second electrode holder, wherein the ceramic tube is arranged in the lamp tube; the first electrode is arranged at the outer side of one end, close to the output window, of the ceramic tube; and one end, close to the second electrode holder, of the first electrode holder and / or one end, close to the first electrode holder, of the second electrode holder are / is coated with an insulating structure. The ultraviolet discharge lamp has the beneficial effects that the insulating structure coating the first electrode holder and / or the second electrode holder is adopted by the ultraviolet discharge lamp; and breakdown voltage between the first electrode holder and the second electrode holder is increased, so that the possibility of glow discharge between the first electrode holder and the second electrode holder is greatly reduced; the operating life of the ultraviolet discharge lamp is prolonged; and the stability of the ultraviolet discharge lamp is improved.