Constructing　heterojunction　is　an　efficient　strategy　to　boost　the　charge　carrier　separation　rate　and　promote　the　catalytic　performance　for　photocatalysts.　In　this　paper,　amorphous　CoMoS4　was　first　deposited　on　the　surface　of　the　flower-like　microspheres　of　CdIn2S4　to　fabricate　CoMoS4/CdIn2S4　composites　for　accelerating　the　photocatalytic　hydrogen　evolution　(PHE)　rate　under　simulated　sunlight　irradiation.　The　compositions,　morphologies,　and　photoelectrochemical　properties　of　the　obtained　samples　were　examined.　SEM　images　show　that　a　great　number　of　CoMoS4　nanoparticles　were　filled　into　the　gaps　of　CdIn2S4　microspheres.　Optical　characterization　shows　that　the　combination　of　CoMoS4　and　CdIn2S4　strongly　strengthened　their　light　absorption　capability.　The　remarkably　promoted　PHE　rate　of　the　optimum　5%-CCIS　catalyst　(2196　μmol　g−1　h−1)　was　8.4　folds　larger　than　that　for　CdIn2S4.　More　importantly,　the　heterostructured　5%-CCIS　composite　also　exhibited　good　activity　stability　in　the　three-cycled　experiments.　Photoelectrochemical　measurements　provided　the　energy　band　potentials　and　demonstrated　the　efficient　charge　separation　efficiency,　consistent　with　the　photocatalytic　activity　of　CoMoS4/CdIn2S4　composites　for　hydrogen　production.　This　study　will　provide　a　new　strategy　to　fabricate　CoMoS4-based　heterostructures　for　boosting　the　hydrogen　evolution　under　visible　light.　©　2023　Hydrogen　Energy　Publications　LLC