Catalytic elimination of CO mainly includes complete oxidation(CO-COOX) and preferential oxidation of CO(CO-PROX).First,combined with our group's research,a brief introduction to the active species and the interaction between components in Cu-based catalysts for CO-COOX was presented from the perspective of the catalyst system.Then recent progress in CO-PROX under H2-rich over Cu-based catalysts was systematically summarized.Influence of the preparation method,promoter,and support of CuO-CeO2 catalyst as well as transition metal ions doped support(CuO/Ce1-xMxO2),and inverse structure(CeO2/CuO) on the catalytic performance in CO-PROX was elaborated.Finally,the application problems and future research trend of Cu-based catalysts for catalytic removal of CO were discussed and summarized.