Photosynthesis　of　H2O2　from　O-2　and　H2O　with　inexhaustible　sunlight　as　an　energy　source　is　a　promising　approach.　However,　the　photocatalytic　performance　of　pristine　polymeric　carbon　nitride　(PCN)　is　extremely　restrained　due　to　the　rapid　recombination　of　photo-generated　electrons　and　holes,　and　slow　surface　reaction　processes.　Herein,　a　new　strategy　is　developed　to　rationally　integrate　N,　S-co-doped　carbon　(C-NS),　and　CoS2　on　cyano-rich　PCN　(PCN-Cy)　for　photosynthesis　of　H2O2　under　ambient　conditions.　The　engineering　with　cyano　groups　(electron-withdrawing　groups)　promotes　the　bulk　charge　separation　of　PCN.　Experimental　results　reveal　that　the　CoS2　co-catalyst　not　only　serves　as　an　electron　acceptor　to　extract　charges　from　the　bulk　but　also　functions　as　an　active　site　to　promote　the　2-e(-)　ORR　process.　Besides,　the　N,　S-co-doped　carbon　performs　as　an　electron　channel　to　promote　migration　of　charges　at　the　interface　of　PCN-Cy　and　CoS2.　Accordingly,　the　as-synthesized　cyano-rich　PCN　photocatalyst　integrated　with　N,　S-co-doped　carbon　and　CoS2　exhibits　a　remarkable　activity　of　321.9　mu　m　h(-1)　for　photocatalytic　production　of　H2O2,　which　is　44.9　times　higher　than　that　of　the　pristine　PCN.