NOVELTY - Catalyst for preparing aromatic hydrocarbon by converting methanol comprises component A and component B, where the weight ratio of component A to component B is 0.25-4. The component A is modified zeolite molecular sieve including molecular sieve (80-99%) and molecular sieve modifier (1-20%). The molecular sieve is silicoaluminophosphate-11 (SAP0-11), SAP0-34, H-zeolite socony mobil-5 (HZSM-5), HZSM-22, HZSM-11, H- beta , and HY. The molecular sieve modifier is chromium, molybdenum, tungsten, copper, zinc, iron, cobalt, and nickel elements.    USE - Used as a catalyst for preparing aromatic hydrocarbon by converting methanol (claimed). The non-aromatic hydrocarbon liquid product is used as solvent oil or gasoline component.    ADVANTAGE - The catalyst can prepare benzene, toluene and xylene of high yield, and high selectivity; and has high activity and long service life. The non-aromatic hydrocarbon liquid product and 4C hydrocarbon in the gas-phase product can be introduced in the catalyst bed layer for equilibrating the reaction heat and improving total yield of aromatic hydrocarbon.    DETAILED DESCRIPTION - Catalyst for preparing aromatic hydrocarbon by converting methanol comprises component A and component B, where the weight ratio of component A to component B is 0.25-4. The component A is modified zeolite molecular sieve including molecular sieve (80-99%) and molecular sieve modifier (1-20%). The molecular sieve is silicoaluminophosphate-11 (SAP0-11), SAP0-34, H-zeolite socony mobil-5 (HZSM-5), HZSM-22, HZSM-11, H- beta , and HY. The molecular sieve modifier is chromium, molybdenum, tungsten, copper, zinc, iron, cobalt, and nickel elements. The component B comprises oxide (85-95%), metal element (0.5-10%), and halogen (0.1-5%). The oxide is aluminum oxide, and/or silicon dioxide. The metal element is chromium, molybdenum, tungsten, copper, zinc, tin, iron, cobalt, nickel, platinum, rhenium, palladium and rare earth elements. An INDEPENDENT CLAIM is also included for preparing the catalyst, comprising preparing component A by transferring the molecular sieve to the aqueous solution containing molecular sieve modifier soluble salt, soaking, drying the soaking solution, and baking at 400-550 degrees C for 2-8 hours, and then preparing component B by soaking method, including (i) transferring the oxide to the aqueous solution containing supported metal element soluble salt, drying the solution, baking at 350-550 degrees C for 2-8 hours, (ii) processing the processed grain by hydrogen chloride steam at 250-550 degrees C for 0.5-5 hours, and (iii) reducing the processed material of step (ii) in hydrogen at 300-600 degrees C for 0.5-10 hours, mixing, pressing, extruding and molding component A and component B.