A　gold　nanoparticle　catalyst　supported　on　the　ZIF-8　(a　metal-organic　frameworks)　modified　TiO2　(Au/ZIF-8-TiO2)　was　prepared　by　self-assembly　together　with　solvothermal　and　deposition-precipitation　methods,　which　its　performance　of　catalytic　oxidizing　CO　was　evaluated　and　compared　with　that　of　Au/TiO2　and　Au/ZIF-8,　respectively.　It　was　found　that　the　incorporation　of　ZIF-8　into　Au/TiO2　could　remarkably　enhance　the　catalytic　activity　of　Au/TiO2　both　in　dark　and　under　visible　light　irradiation.　The　characterization　result　of　Au/ZIF-8-TiO2　showed　that　the　sheet　of　ZIF-8　was　distributed　on　the　surface　of　TiO2　microspheres　to　enhance　the　surface　roughness　of　TiO2,　which　could　effectively　limit　the　migration　and　aggregation　of　Au　nanoparticles　(i.e.,　enhancing　the　dispersion　of　Au　nanoparticles　at　support)　due　to　its　large　surface　area　and　porousness.　Moreover,　Au/ZIF-8-TiO2　owned　a　higher　surface　electron　density　of　both　Au　nanoparticles　and　TiO2　as　compared　to　Au/TiO2.　It　is　proposed　that　ZIF-8　with　abundant　delocalized　electrons　of　π　bond　could　act　as　an　electron　donor　for　TiO2　and　Au　in　the　structure　of　Au/ZIF-8-TiO2,　but　it　act　as　an　electron　transfer　mediator　to　promote　the　electron　transfer　between　Au　and　TiO2　induced　by　the　localized　surface　plasmon　resonance　of　Au　nanoparticles　under　visible　light　irradiation.　These　behaviors　would　promote　the　adsorption　and　activation　of　CO　and　O2　at　Au　or　TiO2　sites,　resulting　in　the　enhanced　CO　oxidation.　©　2017　Elsevier　B.V.