alpha-MnO2-supported　gold　catalysts　(xAu/alpha-MnO2,　x=0-7　(corresponding　to　the　Au　loading　(mass　fraction)　of　0-7%)　were　prepared　by　a　deposition-　precipitation　method　using　urea　as　a　precipitation　agent　and　characterized　by　different　techniques　such　as　X-ray　diffraction　(XRD),　N-2　adsorption-desorption　measurements,　transmission　electron　microscopy　(TEM),　X-ray　photoelectron　spectroscopy　(XPS),　and　H-2　temperature-programmed　reduction　(TPR).　The　catalytic　activities　of　the　materials　were　evaluated　for　the　oxidation　of　CO　and　benzene.　The　Au　particle　size　was　found　to　be　related　to　the　Au　loading　of　the　xAu/alpha-MnO2　samples　and　increased　with　Au　loading.　XPS　results　showed　that　the　mole　ratios　of　O2-/(O-2(2-)　or　O-),　Mn4+/Mn3+　and　Au3+/Au-0　increased　upon　the　addition　of　Au.　The　loading　of　gold　over　alpha-MnO2　significantly　modified　the　catalytic　activities.　The　catalytic　performance　of　xAu/alpha-MnO2　strongly　depended　on　the　Au　loading,　and　3Au/alpha-MnO2　gained　the　best　activity　at　T(90=)80　degrees　C　and　T-90=20　degrees　C　for　the　catalytic　oxidation　of　CO　and　benzene,　respectively.　The　excellent　performance　of　3Au/alpha-MnO2　is　associated　with　highly　dispersed　Au,　good　low-temperature　reducibility,　and　a　synergism　at　the　interface　between　the　Au　and　MnO2　nanodomains.