SnS2/SnO2　nanocomposites　have　been　successfully　prepared　via　a　hydrothermal　method　using　electrospun　SnO2　nanotubes　as　both　substrates　and　reactants.　The　ratios　of　the　nanocomposites　are　controlled　by　varying　the　concentration　of　thioacetamide　during　the　solvothermal　synthesis　processes.　The　as-prepared　SnS2/SnO2　nanocomposites　exhibit　considerable　improvement　on　the　photocatalytic　activities　for　the　reduction　of　aqueous　Cr(VI)　under　visible　light　irradiation.　Their　photoactivities　are　also　much　higher　than　that　of　SnS2　nanoplates　and　a　physical　mixture　of　SnO2　and　SnS2.　In　particular,　the　SnS2/SnO2-B　sample　exhibits　the　highest　photocatalytic　activity.　After　visible　light　irradiation　for　60　min,　the　reduction　rate　has　reached　about　100%.　The　photoelectrochemical　analyses　further　show　that　the　high　photocatalytic　activity　of　the　SnS2/SnO2-B　sample　can　be　ascribed　to　the　unique　structural　features　and　the　intimate　interfacial　contact　between　SnS2　and　SnO2,　which　is　more　effective　separation　of　the　photo-generated　carriers.