Photocatalytic　overall　water　splitting　is　considered　NO　as　an　ideal　solution　to　the　energy　crisis　by　converting　inexhaustible　solar　energy　into　hydrogen　energy.　However,　the　practical　application　of　photocatalytic　overall　water　splitting　is　hindered　by　the　challenges　including　unfavorable　four-electron/hole　kinetics　and　H-2/O-2.　separation.　Here,　the　binary　composite　of　reduced　graphene　oxide　and　graphitic　carbon　nitride　decorated　by　the　double　cocatalyst　(Pt　and　PtO2)　is　reported　to　achieve　excellent　photocatalytic　water　reforming　performance　for　H-2　and　H2O2　production　via　the　two-electron　pathway.　In　addition,　a　unique　structure　with　Pt　and　PtO2　as　active　sites　for　reduction　and　oxidation,　respectively,　is　further　proposed.　This　unique　structure　promotes　the　separation　of　photogenerated　carriers　and　holes,　extends　the　light　absorption,　and　thus　significantly　improves　photocatalytic　activity　with　the　highest　H-2　evolution　rate　of　5.7　mu　mol.h(-1).　What＇s　more,　the　addition　of　reduced　graphene　oxide　can　improve　the　photocatalytic　stability　of　the　catalyst　by　reinforcing　the　chemical　connection　between　graphitic　carbon　nitride　and　PtOx　(Pt,　PtO2).　This　work　highlights　the　important　role　of　using　graphitic　carbon　nitride　for　heterogeneous　catalysis　and　reveals　the　possibility　of　designing　multiple　components　to　realize　an　efficient　photocatalytic　water　reforming.