Abstract: A series of Fe/ZSM-5 zeolites with different contents of Fe were hydrothermally synthesized by changing the Si/Fe ratio (the same gel of SiO2/Al2O3=100) and their catalytic performance for toluene alkylation with methanol was investigated in a continuous fluid fixed bed reactor at normal atmosphere. The structure, pore properties and acidity of Fe/ZSM-5 zeolites were characterized by X-ray diffraction, electronic paramagnet resonance, low temperature N2 adsorption, NH3-TPD and Py-IR. The results indicate that the partial introduction of Fe atoms into the zeolite frameworks in the synthetic process does not destroy the ZSM-5 framework structure, while it leads to the decrease in crystallization capacity, the change in acidity and the lowering in the acid strength. As a result, the coke formation during the alkylation reaction process is suppressed. Hence, the stability of zeolite and the utilization ratio of methanol are improved.