Abstract: The core-shell composite zeolite Zn-ZSM-5/Pt-L was prepared via step by step modification. The surface acidity was regulated by changing the ratio of two metals. The physical and chemical properties were investigated by X-ray diffraction (XRD), N2 adsorption-desorption, ammonia temperature-programmed desorption (NH3-TPD) and in situ Py-FTIR spectroscopy. The light hydrocarbon aromatization performance of catalysts was evaluated using n-pentane as the raw material. The results exhibit that the modification of introducing active metal step-by-step effectively regulates the L/B acid ratio and distribution on the catalyst surface, which could cause more excellent synergism between B acid and L acid. At the loading of Zn and Pt metal of 1.0% and 0.6%, respectively, the catalytic performance reaches the best. The conversion rate of pentane aromatization is 99.1 % and aromatic selectivity is up to 47.2%.