A　Z-scheme　system　is　ideal　for　photocatalysis　hydrogen　evolution　due　to　spatially　separating　photogenerated　electron–hole　pairs　and　strong　redox　ability.　However,　the　construction　of　such　a　system　to　achieve　rapid　charge　transfer　is　still　a　big　challenge.　Hierarchical　functional　nanomaterials　with　controllable　morphology,　dimensionality,　and　electronic　property　can　open　more　possibilities　for　designing　active　Z-scheme　photocatalysts.　Herein,　we　construct　hierarchical　direct　Z-scheme　composites　of　epitaxial　ultrathin　ZnIn2S4　nanosheets　on　HxMoO3　nanobelts,　which　exhibits　10.5　times　higher　H2-production　activity　(5.9　mmol·g−1·h−1)　than　pristine　ZnIn2S4　with　visible　light.　High　conductivity　and　tunable　charge　transfer　efficiency　of　HxMoO3　component　resulting　from　hydrogen　intercalation　are　favourable　to　the　effective　transport　of　charge　carriers.　Moreover,　hierarchical　architecture　composed　of　2D　nanosheets　increases　intimate　interface　for　effective　separation　of　electron–hole　pairs　and　exposes　more　reactive　sites.　The　study　provides　a　new　sight　in　designing　hierarchical　direct　Z-scheme　photocatalyst　for　solar　fuel　generation.　©　2020