Catalytic combustion is one of the effective methods to convert and utilize low concentration gas at present.In order to investigate the effect of preparation technology on the catalytic performance of Co-Cu composite oxide catalyst for low concentration gas combustion,the Co-Cu composite catalyst was prepared by sol-gel method and coprecipitation method respectively and used for low concentration gas catalytic combustion reaction（methane volume fraction is 1.69%）.The effects of the preparation method,calcination temperature and n（Co）:n（Cu） on the catalyst performance were investigated.The catalyst was characterized by scanning electron microscopy（SEM）,X-ray diffraction（XRD）,hydrogen programmed temperature reduction（H,2,-TPR） and X-ray photoelectron spectroscopy（XPS）.The optimum calcination temperature and n（Co）:n（Cu） are 400℃ and 1:1,respectively.The catalyst prepared under these conditions has the highest catalytic activity.The results show that the catalysts prepared by coprecipitation method have higher catalytic activity than that prepared by sol-gel method（n（citric acid）:n（metal ion） is 3:2）.The characteristic methane conversion temperatures of t,10,t,50, and t,90,（at which methane conversion rate is 10%,50%,and 90%respectively） are lower by 6℃,70℃ and 1℃,respectively.