This invention relates to a method for preparing a clean gasoline, which is composed of: base gasoline 5-10 wt.%, methanol 30-40 wt.%, thinner 40-60 wt.% and core additive 1-3 wt.%. The method comprises: (1) preparing the core additive; (2) adding base gasoline, methanol and thinner into a mixing tank under stirring and atmospheric pressure, and keeping the temperature at 5-50 deg.C; (3) adding the core additive into the mixture under stirring, and mixing evenly to obtain the clean gasoline. The obtained clean gasoline has good environmental protection effect. |