Construction　of　multi-channels　of　photo-carrier　migration　in　photocatalysts　is　favor　to　boost　conversion　efficiency　of　solar　energy　by　promoting　the　charge　separation　and　transfer.　Herein,　a　ternary　ZnIn2S4/g-C3N4/Ti3C2　MXene　hybrid　composed　of　S-scheme　junction　integrated　Schottky-junction　was　fabricated　using　a　simple　hydrothermal　approach.　All　the　components　(g-C3N4,　ZnIn2S4　and　Ti3C2　MXene)　demonstrated　two-dimensional　(2D)　nanosheets　structure,　leading　to　the　formation　of　a　2D/2D/2D　sandwich-like　structure　with　intimate　large　interface　for　carrier　migration.　Furthermore,　the　photogenerated　carriers　on　the　g-C3N4　possessed　dual　transfer　channels,　including　one　route　in　S-scheme　transfer　mode　between　the　g-C3N4　and　ZnIn2S4　and　the　other　route　in　Schottky-junction　between　g-C3N4　and　Ti3C2　MXene.　Consequently,　a　highly　efficient　carrier　separation　and　transport　was　realized　in　the　ZnIn2S4/g-C3N4/Ti3C2　MXene　heterojunction.　This　ternary　sample　exhibited　wide　light　response　from　200　to　1400　nm　and　excellent　photocatalytic　H2　evolution　of　2452.1　μmol·g–1·h–1,　which　was　200,　3,　1.5　and　1.6　times　of　g-C3N4,　ZnIn2S4,　ZnIn2S4/Ti3C2　MXene　and　g-C3N4/ZnIn2S4　binary　composites.　This　work　offers　a　paradigm　for　the　rational　construction　of　multi-electron　pathways　to　regulate　the　charge　separation　and　migration　via　the　introduction　of　dual-junctions　in　catalytic　system.　©　2022　Dalian　Institute　of　Chemical　Physics,　the　Chinese　Academy　of　Sciences