The invention relates to a catalyst for preparing arene via direct methanol conversion and a preparation method thereof, and mainly solves the problems that the existing catalyst is fast in carbon deposition and low in stability during a reaction process. The catalyst provided by the invention comprises the following components according to parts by weight: a) 20 to 75 parts of binding agent; b) 20 to 75 parts of ZSM-5 molecular sieve; and c) 0.5 to 10 parts of zinc or oxides thereof, wherein the ratio of SiO2 to Al2O3 in the ZSM-5 molecular sieve is 20 to 200; the molecular sieve is firstly treated by using a base solution with the concentration of 0.1 to 2 mol/L before the catalyst is prepared; and the base solution is one of potassium hydroxide aqueous solution or sodium hydroxide aqueous solution. Therefore, according to the technical scheme of the catalyst and the preparation method thereof, the problems are solved well. As a result, the catalyst provided by the invention can be applied to the industrial production of arene via direct methanol conversion.