In　response　to　aggravated　fossil　resources　consuming　and　greenhouse　effect,　CO2　reduction　has　become　a　globally　important　scientific　issue　because　this　method　can　be　used　to　produce　value-added　feedstock　for　application　in　alternative　energy　supply.　Photoelectrocatalysis,　achieved　by　combining　optical　energy　and　external　electrical　bias,　is　a　feasible　and　promising　system　for　CO2　reduction.　In　particular,　applying　graphene　in　tuning　photoelectrochemical　CO2　reduction　has　aroused　considerable　attention　because　graphene　is　advantageous　for　enhancing　CO2　adsorption,　facilitating　electrons　transfer,　and　thus　optimizing　the　performance　of　graphene-based　composite　electrodes.　In　this　review,　we　elaborate　the　fundamental　principle,　basic　preparation　methods,　and　recent　progress　in　developing　a　variety　of　graphene-based　composite　electrodes　for　photoelectrochemical　reduction　of　CO2　into　solar　fuels　and　chemicals.　We　also　present　a　perspective　on　the　opportunities　and　challenges　for　future　research　in　this　booming　area　and　highlight　the　potential　evolution　strategies　for　advancing　the　research　on　photoelectrochemical　CO2　reduction.