CdIn2S4　microspheres　were　synthesized　by　a　facile　hydrothermal　method　with　the　temperature　ranging　from　120　to　200　°C.　X-ray　diffraction,　UV-vis　diffuse　reflectance　spectroscopy,　nitrogen　sorption　analysis,　X-ray　photoelectron　spectroscopy,　scanning　electron　microscopy　and　transmission　electron　microscopy　were　used　to　characterize　the　products.　It　was　found　that　the　crystallographic　structure　and　optical　property　of　the　products　synthesized　at　different　temperature　were　almost　the　same.　The　SBET　of　CdIn2S4　products　decreased　when　the　synthesized　temperature　increased,　and　the　largest　SBET　was　33.16　m2　g-1　(120　°C　sample).　The　degradation　of　methyl　orange　(MO)　under　the　visible-light　irradiation　had　been　used　as　a　probe　reaction　to　investigate　the　photocatalytic　activity　of　the　as-prepared　CdIn2S4,　which　showed　that　the　CdIn2S4　sample　synthesized　at　120　°C　presented　the　best　photocatalytic　activity　for　MO　degradation.