The use of negative oxygen ion repair liquid through the action of the automobile power hoist can effectively decompose the three-way catalytic surface carbon, reduce the metal coating, and the high-temperature steam generated by the action of the hydrogen-oxygen nano-liquid can effectively activate the surface metal activity of the three-way catalytic converter and make the three Yuan returns to the state of a new car, reduces back pressure, pulls through the exhaust emission system, and improves car performance.