The　rational　interface　tailoring　of　nanosheets　on　hollow　spheres　is　a　promising　strategy　to　develop　efficient　photocatalysts　for　hydrogen　production　with　solar　energy.　Among　the　various　photocatalyst　materials,　metal　sulfides　have　been　extensively　researched　because　of　their　relatively　narrow　band　gap　and　superior　visible-light　response.　ZnIn2S4　is　a　layered　ternary　chalcogenide　semiconductor　photocatalyst　with　a　tunable　band　gap　energy　(approximately　2.4　eV).　Among　various　metal　sulfide　photocatalysts,　ZnIn2S4　has　gained　considerable　attention.　However,　intrinsic　ZnIn2S4　only　exhibits　a　relatively　moderate　photocatalytic　activity,　which　is　mainly　owing　to　the　high　recombination　and　low　migration　rate　of　photocarriers.　Loading　cocatalysts　onto　semiconductor　photocatalysts　is　an　effective　way　to　improve　the　performance　of　photocatalysts,　because　it　can　not　only　facilitate　the　separation　of　electron-hole　pairs,　but　also　reduce　the　activation　energy　for　proton　reduction.　As　a　ternary　transition　metal　sulfide,　NiCo2S4　features　a　high　electrical　conductivity,　low　electronegativity,　excellent　redox　properties,　and　outstanding　electrocatalytic　activity.　Such　favorable　characteristics　suggest　that　NiCo2S4　can　expedite　charge　separation　and　transfer,　thereby　promoting　photocatalytic　H-2　production　by　serving　as　a　cocatalyst.　Moreover,　both　NiCo2S4　and　ZnIn2S4　possess　the　ternary　spinel　crystal　structure,　which　may　facilitate　the　construction　of　NiCo2S4/ZnIn2S4　hybrids　with　tight　interfacial　contact　for　an　enhanced　photocatalytic　performance.　Herein,　ultrathin　ZnIn2S4　nanosheets　were　grown　in　situ　on　a　non-noble-metal　cocatalyst,　namely　NiCo2S4　hollow　spheres,　to　form　hierarchical　NiCo2S4@ZnIn2S4　hollow　heterostructured　photocatalysts　with　an　intimately　coupled　interface　and　strong　visible　light　absorption　extending　to　ca.　583　nm.　The　optimized　NiCo2S4@ZnIn2S4　hybrid　with　a　NiCo2S4　content　of　ca.　3.1%　exhibited　a　high　hydrogen　evolution　rate　of　78　mu　mol.h(-1),　which　was　approximately　9　times　higher　than　that　of　bare　ZnIn2S4　and　3　times　higher　than　that　of　1%　(w,　mass　fraction)　Pt/ZnIn2S4.　Additionally,　the　hybrid　photocatalysts　displayed　good　stability　in　the　reaction.　Photoluminescence　and　electrochemical　analysis　results　indicated　that　NiCo2S4　hollow　spheres　served　as　an　efficient　cocatalyst　for　facilitating　the　separation　and　transport　of　light-induced　charge　carriers　as　well　as　reducing　the　hydrogen　evolution　reaction　barrier.　Finally,　a　possible　reaction　mechanism　for　the　photocatalytic　hydrogen　evolution　was　proposed.　In　the　NiCo2S4@ZnIn2S4　composite　photocatalyst,　the　NiCo2S4　cocatalyst　with　high　electrical　conductivity　favorably　accepts　the　photoinduced　electrons　transferred　from　ZnIn2S4　and　then　employs　the　electrons　to　reduce　protons　for　H-2　production　on　the　reactive　sites.　Concurrently,　the　photogenerated　holes　are　trapped　by　TEOA　that　acts　as　a　hole　scavenger　to　accomplish　the　photoredox　cycle.　This　study　provides　guidance　for　the　fabrication　of　hierarchical　hollow　heterostructures　based　on　nanosheet　semiconductor　subunits　as　remarkable　photocatalysts　for　hydrogen　production.