Photocatalytic　CO2　reduction　is　an　attractive　approach　for　the　direct　conversion　of　solar　energy　into　chemical　fuels.　In　this　study,　we　synthesized　a　composite　material　that　consists　of　Ag,　reduced　graphene　oxide　(RGO),　and　CdS　nanorods　as　a　photocatalyst　for　CO2　reduction.　The　morphological,　structural,　optical,　and　electrochemical　properties　of　the　resultant　nanocomposite　(Ag-RGO-CdS)　were　investigated　by　using　various　physical　techniques　(e.g.,　XRD,　SEM,　TEM,　X-ray　photoelectron　spectroscopy,　UV/Vis　diffuse　reflectance　spectroscopy,　and　electrochemical　impedance　spectroscopy).　Our　results　indicate　that　the　Ag-RGO-CdS　nanocomposites　exhibit　an　enhanced　photocatalytic　activity　for　the　conversion　of　CO2　into　CO,　and　the　optimum　activity　is　achieved　over　1.0wt%　Ag-3.0　wt%　RGO-CdS.　This　enhanced　performance　can　be　ascribed　to　the　multifunctional　promoting　effects　of　RGO　and　Ag　in　the　composite.　On　one　hand,　RGO　and　Ag　can　act　as　electron　acceptors,　which　enhances　the　separation　efficiency　of　photogenerated　carriers.　On　the　other　hand,　the　incorporation　of　RGO　and　Ag　can　improve　the　adsorption　and　activation　of　CO2,　which　results　in　the　enhancement　of　the　photocatalytic　reduction　of　CO2　to　CO.　Furthermore,　a　possible　mechanism　for　photocatalytic　CO2　reduction　over　the　Ag-RGO-CdS　nanocomposites　was　proposed.　This　study　demonstrates　a　semiconductor-based　hybrid　for　efficient　photocatalytic　CO2　reduction　by　virtue　of　the　combinational　effect　of　dual　cocatalysts.