Cooking oil fumes (COFs) are considered to be one of the important pollution sources in urban areas, and nonmethane hydrocarbon (NMHC) can be an index of volatile organic compounds (VOCs) from COFs. In this paper, cordierite supported Mn-CeOx catalysts were used for NMHC oxidation in COFs. The results showed that the catalytic oxidation activity of Mn-CeOx/cordierite was obviously improved by adding an appropriate proportion of Ce. The catalytic activity of Mn4Ce1/C was obviously better than catalysts with other molar ratios of Mn/Ce and Mn/C because of the extra adsorbed oxygen species and high ratio of Ce4+-/Ce3+ according to the XPS analysis. The physisorption of N-2 and SEM-EDS revealed that the structure of catalysts prepared by a sol-gel method presented a higher BET specific surface area, more abundant pore structure, and better dispersion of catalysts' active components which were favorable for catalytic oxidation reaction of NMHC.