A　rapid　microwave-assisted　method　has　been　developed　for　the　preparations　of　flower-like　RGO/ZnIn2S4　microspheres　which　are　consisted　of　interwoven　nanosheets　of　ZnIn2S4　and　RGO.　The　as-prepared　samples　were　characterized　by　X-ray　diffraction　(XRD),　Fourier　transform　infrared　spectroscopy　(FT-IR),　Raman　spectroscopy,　X-ray　photoelectron　spectroscopy　(XPS),　scanning　electron　microscopy　(SEM),　transmission　electron　microscopy　(TEM)　and　high-resolution　transmission　electron　microscopy　(HRTEM).　The　mechanism　for　the　formation　of　the　flower-like　microspheres　of　RGO/ZnIn2S4　nanocomposites　via　the　microwave-assisted　method　has　been　proposed.　As　compared　with　the　samples　obtained　solvothermally,　the　RGO/ZnIn2S4　microspheres　obtained　via　the　microwave-assisted　method　show　highly　enhanced　photocatalytic　performance　for　hydrogen　evolution　under　visible　light　irradiations,　due　to　the　existence　of　strong　interaction　between　ZnIn2S4　and　RGO.　The　highest　hydrogen　evolution　rate　(132.3μmolh-1),　observed　over　an　optimum　RGO　loading　amount　of　1.0wt%,　is　comparable　to　that　over　1.0wt%-Pt/ZnIn2S4　(129.0μmolh-1).　This　work　demonstrates　the　important　role　played　by　microwave　heating　in　the　preparations　of　RGO-based　materials.　The　results　also　highlight　the　potential　of　using　RGO　as　a　non-noble　metal　cocatalyst　in　the　photocatlaytic　hydrogen　evolution　process.　©　2014　Elsevier　B.V.