This　paper　presented　the　study　on　the　catalytic　performance　of　a　deposition-precipitation　prepared　Au　catalyst　supported　on　copper-manganese　complex　oxide,　which　was　synthesized　via　a　sol-gel　method.　This　Au/CuxMnyOz　catalyst　with　a　low　Au　content　exhibited　high　activity　for　both　preferential　CO　oxidation　and　water-gas　shift　reaction.　The　structure-activity　relationship　was　investigated　by　N2　physisorption,　X-ray　diffraction,　transmission　electron　microscopy,　X-ray　photoelectron　spectroscopy,　H2　temperature-programmed　reduction,　and　X-ray　fluorescence　characterization.　The　results　revealed　that　the　CuxMnyOz　samples　exist　mainly　in　the　form　of　nonstoichiometric　spinel　Cu1.5Mn1.5O4　phase,　which　favors　the　CO　conversion　in　both　CO　removal　reactions.　Most　Au　species　dispersed　onto　the　surface　of　Cu-Mn　complex　oxide　in　the　metallic　state　of　Au0.　The　relatively　strong　interaction　between　Au　and　support　enhanced　the　reducibility　of　Au/CuxMnyOzcatalyst,　which　is　also　responsible　for　the　excellent　performance　of　the　as-prepared　catalyst.