Complete oxidation of benzene over supported manganese oxides catalysts was studied. Composite supports Ce 0.5+x Zr 0.4−x La 0.1 O 1.95 -Al 2 O 3 (x=0, 0.1, 0.2, 0.3, 0.4), and CeO 2 -Al 2 O 3 were prepared by co-precipitation method, and manganese oxides (MnO x ) catalysts were prepared by incipient wetness method. Catalytic activity was performed in a conventional fixed bed flow reactor. Among these catalysts, MnO x supported on Ce 0.8 Zr 0.1 La 0.1 O 1.95 -Al 2 O 3 was found to have the highest catalytic activity for benzene oxidation. The complete conversion temperature of benzene on MnO x /Ce 0.8 Zr 0.1 La 0.1 O 1.95 -Al 2 O 3 was 328 °C. The catalysts were characterized by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) specific surface area, X-ray photoelectron spectra (XPS) and H 2 -temperature programmed reduction (H 2 -TPR). The results of BET and XRD measurements indicated that the addition of ZrO 2 improved the textural properties. XPS measurements showed that MnO x was composed of MnO 2 and Mn 2 O 3 . The catalysts reported in this work have significant potential in industrial application for their high performance and low cost.