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Artificial photosynthesis is deemed as an effi-cient protocol for transforming abundant solar energy into valuable fuel.In this paper,the well-defined one-dimen-sional(1D)core-shell MnO2@CdS hybrids were con-structed by employing MnO2 nanotubes and CdS nanoparticles as nano-building blocks via a chemical co-precipitation route.The rationally designed core-shell structure provided an intimate heterojunction interface between the CdS shell and MnO2 core.All the MnO2@CdS core-shell nanocomposites possess higher H2 evolution rate through visible light irradiation contrary to pristine CdS,and the optimal MnO2@CdS hybrid exhibits the utmost H2 evolution rate of 3.94 mmol·g-l·h-1,which is 2.8-fold higher compared with that of CdS.Appertaining to XPS and Mott-Schottky(M-S)analysis,such enhanced photocatalytic H2 generation of MnO2@CdS heterojunc-tion was ascribed to an S-scheme mechanism,which sup-pressed the charge recombination along with a fast detachment of electron-hole pairs(e--h+)and signifi-cantly improved the severance of carriers,thus improved H2 evolution performance.These findings envision a new insight into the development of S-scheme heterostructure for photocatalytic H2 generation.