Aiming at the problems of large amount of iodine reagent and poor selectivity of halogenation reaction in the production process of cortisone acetate, this study reported a process route for the synthesis of cortisone acetate from 11α, 17α-dihydroxyprogesterone through three steps of bromine substitution, nucleophilic substitution and oxidationBy adopting the process of bromination first and then oxidation, the regioselectivity of the bromination reaction and the product quality of the halogenated intermediate were improved, and the total reaction yield of the reaction reached 54%.The structure of the product was confirmed by 1H NMR and 13C NMR data.