NOVELTY - Vehicle methanol-diesel fuel comprises methanol, diesel oil, a stabilizer, a modifier and a cosolvent. The stabilizer comprises methanol, long chain alcohol, aliphatic amine and an emulsifier. The long chain alcohol is long chain fatty alcohol. The aliphatic amine is triethylamine, trolamine, diethylamine and/or 13C aliphatic amine. The emulsifier is tetrahydrofuran, ethyl acetate, butanol, Span-80 (RTM: Sorbitan monooleate), peregal, nonylphenol polyoxyethylene ether and/or octylphenol polyoxyethylene ether. The modifier comprises e.g. ethanol and corrosion inhibitor.    USE - Used as a vehicle methanol-diesel fuel.    ADVANTAGE - The vehicle methanol diesel fuel has simple formulation, good stability, high flash point and good ignition performance; ensures main technical index, which meets the national relative standards; solves the problems of corrosion of metal components, swelling of rubber devices, water stratification, and low cetane number and low flash point; and is directly used without changing the conditions of diesel engines.    DETAILED DESCRIPTION - Vehicle methanol-diesel fuel comprises (in wt. ratio) methanol (5-35), diesel oil (65-95), a stabilizer (0.1-10), a modifier (0.1-8) and a cosolvent (2-20). The stabilizer comprises (in wt. ratio) methanol (60-80), long chain alcohol (40-60), aliphatic amine (20-40) and an emulsifier (10-20). The long chain alcohol is 9-15C fatty alcohol. The aliphatic amine is triethylamine, triethanolmine, diethylamine and/or 13C aliphatic amine. The emulsifier is tetrahydrofuran, ethyl acetate, butanol, Span-80 (RTM: Sorbitan monooleate), peregal, nonylphenol polyoxyethylene ether and/or octylphenol polyoxyethylene ether. The modifier comprises (in wt. ratio) ethanol (50-80), cetane number improver (0.01-10), flash point improver (1-20), corrosion inhibitor (0.01-5) and an anti-swelling agent (0.01-10). The cosolvent is tetrahydrofuran, ethyl acetate, butanol, oleic acid, n-decanol or n-octanol. An INDEPENDENT CLAIM is also included for preparing the vehicle methanol diesel fuel, comprising taking the stabilizer and the modifier according to the weighed proportion, and adding to the modified methanol to obtain denaturated methanol, then adding denaturated methanol to the diesel oil under stirring condition, adding the cosolvent, and dissolving to obtain a clear solution.