Abstract: The benzene catalytic oxidation performance of TS-1 modified by NH4AC and 0.5wt% Sn was studied. The zeolite was characterized by XRD，N2 adsorption - desorption，XRF，NH3-TPD，IR technologies. And the results indicate that the Sn can modulate the pore structure and surface acidity of TS-1. Mesopores are formed from micropores，extra surface area is increased, and a portion of strong acid sites are transformed into weak acid centers. The conversion of benzene on the zeolite with 0.5% Sn reaches 21.20%; phenol and hydroquinone yields are greatly improved by 3.7 times and 7.2 times after the modification , respectively.