▎ 摘　　要

NOVELTY - The preparation method of superfine modified fly ash, graphene oxide and palladium hydrogenation catalyst involves (1) adding fly ash to a planetary ball mill, adding surfactant, and ball milling to obtain superfine fly ash, where the speed of the planetary ball mill at 300-500 radian/minute, the mass ratio of ball ash is 2:1-4:1 and the ball milling time is 5-15 hours, taking proper amount of water, adding sodium metasilicate nonahydrate and potassium hydroxide to water, dissolving, pouring into a stirrer, adding superfine fly ash, starting stirrer, slowly stirring for 3-5 minutes, and quickly stirring for 5-6 minutes to obtain superfine fly ash slurry, and (2) weighing a certain amount of superfine fly ash slurry, adding mixed solution of graphene oxide, palladium salt, fatty alcohol polyoxyethylene methyl terminated polyether and oleic acid, uniformly mixing, ultrasonically processing, and adjusting the pH value to 2-7. USE - Preparation method of superfine modified fly ash, graphene oxide and palladium hydrogenation catalyst. ADVANTAGE - The method enables economical preparation of superfine modified fly ash, graphene oxide and palladium hydrogenation catalyst.