Photocatalytic　conversion　of　CO2into　value-added　chemical　fuels　with　visible　light　provides　a　green　method　to　relieve　the　challenges　of　the　energy　crisis　and　environmental　problems.　Developing　highly　efficient　photocatalysts　is　essential　to　achieve　this　technology.　Herein,　we　designed　and　successfully　synthesized　copper　cobaltite/covalent　triazine-based　framework　(CuCo2O4/CTF-1)　Z-scheme　heterojunction　catalysts　for　photocatalytic　CO2reduction.　The　obtained　CuCo2O4/CTF-1　composites　exhibited　enhanced　photocatalytic　CO　production　activity.　The　optimal　properties　were　12.7-fold　and　11.6-fold　higher　than　those　of　pure　CTF-1　and　CuCo2O4,　respectively.　According　to　the　analysis　of　UV-vis　diffuse　reflectance　spectra,　CO2uptake　isotherms,　electrochemical　impedance　spectroscopy　and　transient　photocurrent　responses,　the　enhanced　photocatalytic　CO　production　performance　of　CuCo2O4/CTF-1　composites　can　be　ascribed　to　its　enhanced　visible　light　absorption　and　CO2adsorption　capability,　increased　spatial　separation　of　photoinduced　charge　carriers,　and　optimized　redox　ability　resulting　from　the　direct　Z-scheme　CuCo2O4/CTF-1　heterojunction.　This　work　offers　a　novel　strategy　for　designing　and　constructing　CTF-based　direct　Z-scheme　heterojunction　photocatalysts　for　photocatalytic　CO2conversion　to　chemical　energy　fuels.　©　The　Royal　Society　of　Chemistry　2021.