The invention relates to an energy-saving and environment-friendly vehicle methanol gasoline and a preparation method thereof, belonging to the technical field of alternative energy sources. The vehicle methanol gasoline is prepared by the following materials by weight percentage: 30-88.5% of white gasoline component oil, 10-55% of methanol and 1.5-15% of composite additive; the composite additive is composed of the following components: 60-77.5% of latent solvent, 17-30% of heat value enriching substance, 0.08-1.3% of power synergistic agent, 3.5-10% of homogeneous catalysis combustion improver, 0.6-3.0% of corrosion and swelling inhibitor and 1.5-3.5% of vapor pressure regulator, after being evenly mixed, the materials are added into 10-55% of methanol, after being slightly stirred, the mixture is filled in 30-85.5% of white gasoline, evenly stirred and is subject to static reaction for 4-8 hours. The methanol gasoline can effectively solve the technical difficult problems of power reduction, high gasoline consumption, corrosiveness, swelling, difficult cold start, high-temperature air resistance, and the like, when the content of methanol gasoline is 10-55%; the vehicle methanol gasoline can be directly used on automobiles, while engines do not need to be modified; the vehicle methanol gasoline can also be mixed or interchanged with white gasoline and ethanol gasoline for application. The invention has the advantages of easily available raw materials, low cost, simple preparation technique and significant energy-saving benefit, and can greatly reduce tail gas pollutant emission.