Small-sized　particles　are　usually　used　as　cocatalysts　and　anchored　onto　a　large-sized　photocatalyst　for　fast　charge　separation.　However,　the　current　problem　for　the　design　of　photocatalysts　is　that　a　high　loading　of　small-sized　particles　leads　to　full　coverage　of　photocatalysts,　resulting　in　the　decrease　of　hydrogen　production.　Here,　we　propose　a　different　way　to　construct　photocatalytic　systems.　Large-scale　carbon　nanotubes　with　doped　nitrogen　(N-CNTs)　are　used　to　couple　with　TiO2　quantum　dots.　The　H-2　yield　for　our　optimized　photocatalytic　system　is　similar　to　146　mmol/g.　With　further　considering　the　light-induced　thermal　effect,　the　H-2　yield　reaches　up　to　similar　to　320.6　mmol/g.　Electrochemical　and　spectroscopic　data　show　that　large-sized　N-CNTs　can　offer　abundant　active　sites　to　realize　the　rapid　carrier　separation　for　tremendously　improved　hydrogen　production.