The invention provides a multifunctional gasoline compound additive which is capable of reducing fuel consumption and decreasing the pollution caused by tail gas emission. The additive comprises a gasoline cleaning agent, a combustion improver, a low temperature start improving agent, an antiknock agent, an anti-oxidizing and anti-gum agent and a metal corrosion inhibitor. By adopting the gasoline compound additive, the cleanness, oxidation resistance and anti-corrosion performance of gasoline can be improved; and meanwhile, the combustion performance of fuel oil can be improved, the fuel consumption is reduced, and the automobile tail gas pollutants can be reduced.