Metal　halide　perovskite　with　a　suitable　energy　band　structure　and　excellent　visible-light　response　is　a　prospective　photocatalyst　for　CO2　reduction.　However,　the　reported　inorganic　halide　perovskites　have　undesirable　catalytic　performances　due　to　phase-sensitive　and　severe　charge　carrier　recombination.　Herein,　we　anchor　the　FAPbBr3　quantum　dots　(QDs)　on　Ti3C2　nanosheets　to　form　a　FAPbBr3/Ti3C2　composite　within　a　Schottky　heterojunction　for　photocatalytic　CO2　reduction.　Upon　visible-light　illumination,　the　FAPbBr3/Ti3C2　composite　photocatalyst　exhibits　an　appealing　photocatalytic　performance　in　the　presence　of　deionized　water.　The　Ti3C2　nanosheet　acts　as　an　electron　acceptor　to　promote　the　rapid　separation　of　excitons　and　supply　specific　catalytic　sites.　An　optimal　electron　consumption　rate　of　717.18　μmol/g·h　is　obtained　by　the　FAPbBr3/0.2-Ti3C2　composite,　which　has　a　2.08-fold　improvement　over　the　pristine　FAPbBr3　QDs　(343.90　μmol/g·h).　Meanwhile,　the　FAPbBr3/Ti3C2　photocatalyst　also　displays　a　superior　stability　during　photocatalytic　reaction.　This　work　expands　a　new　insight　and　platform　for　designing　superb　perovskite/MXene-based　photocatalysts　for　CO2　reduction.　©　2021　American　Chemical　Society.