Borocarbonitride　(BCN)　materials　have　shown　significant　potential　as　photocatalysts　for　hydrogen　production.　However,　traditional　bulk　BCN　exhibits　only　moderate　photocatalytic　activity.　In　this　study,　we　introduce　an　environmentally　conscious　and　sustainable　strategy　utilizing　biomass-derived　carbon　sources　to　synthesize　BCN　nanosheets.　The　hydrogen　evolution　efficiency　of　BCN-A　nanosheets　(110　mu　mol　h-1　g-1)　exceeds　that　of　bulk　BCN　photocatalysts　(12　mu　mol　h-1　g-1)　by　9.1　times,　mainly　due　to　the　increased　surface　area　(205　m2g-1)　and　the　presence　of　numerous　active　sites　with　enhanced　charge　separation　capabilities.　Notably,　the　biomass-derived　BCN　nanosheets　offer　key　advantages　such　as　sustainability,　cost-effectiveness,　and　reduced　carbon　footprint　during　hydrogen　production.　These　findings　highlight　the　potential　of　biomass-based　BCN　nanomaterials　to　facilitate　a　greener　and　more　efficient　route　to　hydrogen　energy,　contributing　to　the　global　transition　towards　renewable　energy　solutions.