This invention relates to a vehicular photoelectron air purifier, and its body is a square-columnar structure and in which comprises: extractor fan, transformer, circuit board, and polarization end ultraviolet ray radiation tube. The said body is equipped with one air inlet and one air outlet; the air outlet locates at the front of the body and an air exhaust frame trellis device is provided on the plane of the front end surface of the body; the air inlet locates at the rear of the body and an air intake frame trellis device is provided at the rear end of the body; the intake frame trellis device provides an air inlet that is used for fixing dustproof frame, dustproof net and dustproof cover; the extractor fan is kept close to the inner surface of the air exhaust frame trellis device; there is an air collector between the air inlet and the extractor fan; the polarization end ultraviolet ray radiation tube lies in the center of the air collector. Because of the outstanding effect of the ultraviolet ray killing virus, bacillus and mildew, the air, under the action of the extractor fan, is forced to pass through around the ultraviolet light tube for the purpose of killing virus, bacillus and mildew; because two extractor fans are arranged abreast along the linear direction of the polarization end ultraviolet ray tube, the air flow increases in amount and the treating capacity strengthens so as to sufficiently kill virus, bacillus and mildew contained in the air.