Abstract: Coconut shell active carbon has gradually become the major catalyst carrier for the degradation of volatile organic compounds due to its large specific surface area and good activation performance. The impregnation method was used to prepare the metal oxide catalysts with porous coconut shell active carbon particles as carriers in this study. It was loaded with single metal oxide and composite metal oxide catalysts with metal elements of Mn, Co and Fe. The catalysts with different compositions were characterized and analyzed by XRD, SEM and EDS. The results showed that catalysts with different activities could be prepared by changing the doping metal ratio and calcination temperature. When the loading ratio of metal components was Mn∶Co∶Fe = 3∶2∶1，and the calcination temperature was 550 ℃, the catalyst showed that the optimal catalytic performance. The research could not only help to realize the resource utilization of solid waste coconut shells, achieve the purpose of economic and environmental protection, but also provide technical support and theoretical basis for practical environmental protection work.

Key words: coconut shell active carbon, catalytic combustion, manganese-based catalyst, degradation, toluene