NOVELTY - Preparation of alcohol-ester multifunctional methanol-gasoline additive comprises dispersing tartaric acid in 5-50 times of alcohol in container; adding acid catalyst, adding water with 1-5 times of alcohol into container volume, adding reactant in container, stirring, heating and refluxing for 4-8 hours at 60-145 degrees C, and cooling to room temperature; and filtering to remove solid acid catalyst, washing to neutral with saturated sodium chloride aqueous solution, separating water solution, drying organic phase of water solution for 2-12 hours, and filtering to remove drying agent.    USE - Method of preparation of alcohol-ester multifunctional methanol-gasoline additive (claimed).    ADVANTAGE - The method is simple; and the product does not need to purify, has good phase stability for methanol-gasoline system and reduces the saturated steam pressure.    DETAILED DESCRIPTION - Preparation of alcohol-ester multifunctional methanol-gasoline additive comprises dispersing tartaric acid in 5-50 times of alcohol in container, with alcohol comprising n-amyl alcohol, isoamyl alcohol, hexanol, heptanol, octanol, nonyl alcohol or decyl alcohol; adding acid catalyst with 1-10% tartaric acid into container, with acid catalyst comprising sulfuric acid, phosphoric acid, polyphosphoric acid, aluminum chloride, ferric chloride, strong-acid cation exchange resin, sodium bisulfate, sulfuric acid, molecular sieve loading zirconium oxide loaded sulfate, ferric oxide loaded sulfuric acid or activated carbon loaded sulfuric acid; adding water with 1-5 times of alcohol into container volume, adding reactant in container, stirring, heating and refluxing for 4-8 hours at 60-145 degrees C, cooling to room temperature, with modifier comprising benzene, toluene, dimethylbenzene, cyclohexane, n-hexane, ethyl acetate or methyl acetate; filtering to remove solid acid catalyst to obtain multifunctional methanol-gasoline additive, when using sulfuric acid, phosphoric acid, polyphosphoric acid, aluminum chloride, ferric chloride is used as acid catalyst when it is not used, filtering, washing until pH by 1-10% sodium carbonate or potassium carbonate aqueous solution to 8-9, and washing to neutral with saturated sodium chloride aqueous solution, separating water solution, adding drying agent to dry organic phase of water solution for 2-12 hours, filtering to remove drying agent to obtain multifunctional methanol-gasoline additive, with drying agent comprising chemical pure or anhydrous sodium carbonate, anhydrous potassium carbonate, anhydrous magnesium sulfate, anhydrous sodium sulfate, anhydrous calcium chloride or 4A molecular sieve.