The invention relates to a catalyst for producing an aromatic hydrocarbon from methanol and a preparation method and application thereof. The catalyst solves the problem that the existing single ten-membered ring molecular sieve-based catalyst has low selectivity to reaction product p-xylene. The catalyst comprises, by weight, a) 25 to 85 parts of a core-shell type composite molecular sieve, b) 0.5 to 10 parts of a metal element and c) 10 to 70 parts of a structural adjuvant. The catalyst and the preparation method well solve the above problem and can be used for industrial production of an aromatic hydrocarbon from methanol.