The exhaust gas from car exhaust pipe contains 150 to 200 different compounds, among which carbon monoxide, hydrocarbons, nitrogen oxides, lead compounds and particulate matter are the most harmful to people. There contains a strong carcinogen, benzo (a) pyrene in the particulate matter in automobile exhaust gas. Harmful gases spread into the air causing photochemical smog and air pollution. Through the strong oxidation ability, ozone can decompose and degrade the toxic and harmful components and peculiar smell in the exhaust gas discharged by the vehicle exhaust detection platform to meet the safety emission standards.