The　construction　of　Z-scheme　heterojunctions　represents　a　promising　sustainable　pathway　to　drive　water　reduction　into　H2　by　solar　energy,　which　poses　great　challenges　for　unfavorable　H　adsorption　and　insufficient　interfacial　contact.　Herein,　we　create　an　atomic　interfacial　contact　of　the　Ni-S　bond　in　the　Z-scheme　heterojunction　between　the　S　vacancy　ZnIn2S4　(Sv-ZIS)　and　LaNiO3　(LNO)　through　interfacial　reconstruction.　The　internal　electric　field　(IEF)　induces　a　directional　charge　transfer　pathway　and　promotes　*H　adsorption,　as　proved　by　the　theoretical　and　experimental　results.　The　optimized　LNO/Sv-ZIS　photocatalyst　generates　116.8　mu　mol　h-1　of　H2　with　an　apparent　quantum　yield　(AQY)　of　22.7　%　at　420　nm　monochromatic　light,　outperforming　the　Sv-ZIS　by　9.4-fold.　This　work　protrudes　atomic-level　interfacial　bond　construction　that　strengthens　Z-scheme　charge　transfer　to　promote　solar　energy　conversion　efficiency.