The invention relates to a high-voltage discharge lamp, which comprises a lamp shell, a high-voltage discharge lamp tube and a lampshade, wherein one end of the lamp shell is open; the high-voltage discharge lamp tube is arranged in the lamp shell; the lampshade is used for sealing the opening of the lamp shell; and a light reflector is arranged in the lamp shell. The light reflection surface of the reflector is made into heaves which have arcuate sections that are in corrugate distribution; the light emitted from the high-voltage discharge lamp tube is projected after being diffused by the heaves so that the light is uniformly distributed. Due to the fact that light reflection surface is made into heaves which have arcuate sections that are in corrugate distribution, the high-voltage discharge lamp solves the problem that the prior high-voltage discharge lamp with a light reflector causes uneven illumination and bright and dark strips, thereby realizing an effect of more uniform illumination.