Photocatalytic　upgrading　of　renewable　biomass　is　a　promising　way　to　relieve　energy　crisis　and　environmental　pollution.　However,　low　photocatalytic　efficiency　and　uncontrollable　selectivity　still　limit　its　development.　Herein,　ultrathin　SnNb2O6　nanosheets　with　high　dispersed　Pt　nanoparticles　(Pt/SN)　were　successfully　developed　as　an　efficient　photocatalyst　for　the　precise　hydrogenation　of　furfural　(FUR)　to　furfuryl　alcohol　(FOL)　under　visible　light　irradiation　and　exhibited　the　high　conversion　of　FUR　(99.9%)　with　the　high　selectivity　for　FOL　(99.9%).　It　was　revealed　that　SN　with　only　4.1　nm　thickness　possess　good　separation　ability　of　photo-generated　carriers　and　abundant　surface　Lewis　acid　sites　(Nb5+)　which　would　selectively　chemisorb　and　activate　FUR　molecules　via　the　Nb···O　=　C　coordination.　Meanwhile,　Pt　nanoparticles　would　gather　photo-generated　electrons　for　greatly　promoting　the　generation　of　active　H　species　to　support　the　hydrogenation　of　FUR　to　FOL.　The　synergistic　effects　between　SnNb2O6　nanosheets　and　Pt　nanoparticles　remarkably　facilitate　the　photocatalytic　performance　for　hydrogenation.　This　work　not　only　confirms　the　great　potential　of　ultrathin　nanosheet　photocatalyst　with　functional　metal　sites　for　precise　upgrading　of　biomass　but　also　provides　an　in-depth　view　to　understand　the　surface/interface　interaction　between　reactant　molecules　and　surface　sites　of　a　photocatalyst.　©　2021　Science　Press