Promising　semiconductor-based　photocatalysis　toward　achieving　efficient　solar-to-chemical　energy　conversion　is　an　ideal　strategy　in　response　to　the　growing　worldwide　energy　crisis,　which　however　is　often　practically　limited　by　the　insufficient　photoinduced　charge-carrier　separation.　Here,　a　rational　cascade　engineering　of　Au　nanoparticles　(NPs)　decorated　2D/2D　Bi2WO6-TiO2　(B-T)　binanosheets　to　foster　the　photocatalytic　efficiency　through　the　manipulated　flow　of　multichannel-enhanced　charge-carrier　separation　and　transfer　is　reported.　Mechanistic　characterizations　and　control　experiments,　in　combination　with　comparative　studies　over　plasmonic　Au/Ag　NPs　and　nonplasmonic　Pt　NPs　decorated　2D/2D　B-T　composites,　together　demonstrate　the　cooperative　synergy　effect　of　multiple　charge-carrier　transfer　channels　in　such　binanosheets-based　ternary　composites,　including　Z-scheme　charge　transfer,　＂electron　sink,＂　and　surface　plasmon　resonance　effect,　which　integratively　leads　to　the　boosted　photocatalytic　performance.