Abstract: Based on the survey results of particulate matter and microorganisms in metro environment, the installation of air purifiers in metro vehicle is considered very necessary. By analyzing the performance of air purifier, the adoption of honeycomb-type round hole air purifier is determined. Laboratory test verifies that the purification, dust removal and bactericidal effects of the purifier could meet all the requirements. In addition, through test in the model car laboratory, the dust removal effect of the honeycomb-type round hole passage purifier proves to be a great improvement compared with the traditional filter screen (G3 standard).