Semiconductor-based　solar-driven　CO2　to　fuels　has　been　widely　reckoned　as　an　ingenious　approach　to　tackle　energy　crisis　and　climate　change　simultaneously.　However,　the　high　carrier　recombination　rate　of　the　photocatalyst　severely　dampens　their　photocatalytic　uses.　Herein,　an　inorganic-organic　heterojunction　was　constructed　by　in-situ　growing　a　dioxin-linked　covalent　organic　framework　(COF)　on　the　surface　of　rod-shaped　beta-Ga2O3　for　solar-driven　CO2　to　fuel.　This　novel　heterojunction　is　featured　with　an　ultra-narrow　bandgap　COF-318　(absorption　edge　=　760　nm),　which　is　beneficial　for　fully　utilizing　the　visible　light　spectrum,　and　a　wide　bandgap　beta-Ga2O3　(absorption　edge　=　280　nm)　to　directional　conduct　electrons　from　COF　to　reduce　CO2　without　electron-hole　recombination　occurred.　Results　showed　that　the　solar　to　fuels　performance　over　beta-Ga2O3/COF　was　much　superb　than　that　of　COF.　The　optimized　Ga2O3/COF　achieved　an　outstanding　CO　evolution　rate　of　85.8　mu　mol　h(-1).g(-1)　without　the　need　of　any　sacrificial　agent　or　cocatalyst,　which　was　15.6　times　more　efficient　than　COF.　Moreover,　the　analyses　of　photoluminescence　electrochemical　characterizations　and　density　functional　theory　(DFT)　calculations　revealed　that　the　fascinate　construction　of　beta-Ga2O3/COF　heterojunction　significantly　favored　charge　separation　and　the　directional　transfer　of　photogenerated　electrons　from　COF　to　beta-Ga2O3　followed　by　CO2.　This　study　paves　the　way　for　developing　effective　COF-based　semiconductor　photocatalysts　for　solar-to-fuel　conversion.