The　InVO4-TiO2　nano-crystalline　photocatalyst　was　prepared　by　sol-gel　method　and　characterized　by　DRS,　FTIR,　Raman　and　XRD.　The　photocatalytic　activities　of　the　prepared　sample　were　investigated　by　photocatalytic　degradation　of　ethylene　in　the　gaseous　phase　under　visible　light　irradiation　(λ>450　nm).　The　results　indicate　that　both　of　pure　TiO2　and　InVO4　or　their　simple　mixture　show　no　photocatalytic　activities　for　degradation　of　ethylene　under　visible　light　irradiation.　However,　as-synthesized　InVO4-TiO2　catalyzes　the　degradation　of　ethylene　into　CO2　under　visible　light　irradiation.　In　addition,　the　interaction　between　InVO4　and　TiO2　results　in　some　structural　distortion　to　all　the　crystal　forms　of　TiO　2　in　as-synthesized　catalyst　InVO4-TiO2.