3-Bromo-2-methylbenzyl alcohol is a pharmaceutical intermediate, which is obtained by esterification and reduction of 3-bromo-2-methylbenzoic acid. Literature reports that 3-bromo-2-methylbenzyl alcohol can be used to prepare fused ring compounds as PD-1/PD-L1 inhibitors, which have the advantages of high activity, high bioavailability, drug stability, and oral administration.