A single metal Pd/γ-Al₂O₃ catalyst and a bimetallic Pd-Ce/γ-Al₂O₃ catalyst were prepared by equal volume impregnation method to investigate the effect of CeO₂ doping on the catalytic oxidation of toluene. The specific surface area, surface morphology and redox properties of the catalyst were characterized with N₂ desorption, SEM and H₂-TPR. It was found that the doping of CeO₂ reduced the specific surface area of Pd/γ-Al₂O₃ catalyst to a certain extent, but increased the pore density of 10nm, and the catalyst still maintained the mesoporous structure. When 4% CeO₂ was added (mass fraction, the same below), the specific surface area of ??the catalyst was reduced to 165m²/g, and there was a certain degree of clogging in the pores, which hindered the diffusion of pollutants and reaction products, and reduced the catalytic performance of the catalyst. The H₂-TPR results showed that there is a strong synergistic effect between Pd and Ce. CeO₂ adjacent to PdO was more likely to open Ce-O bond, which was 0.3compared with single metal 0.2% Pd/γ-Al₂O₃ catalyst. The catalyst of%CeO₂ had a stronger reduction peak, indicating that the introduction of CeO₂ provided more surface oxygen vacancies for the catalyst and enhances the catalytic oxidation ability of the catalyst. in which the T₁₀ and T₉₀ were reduced by 10℃ and 40℃ respectively.