TiO2　is　a　well-known　photocatalyst　due　to　its　excellent　photocatalytic　activity,　low　cost,　and　stability.　However,　its　practical　applications　are　limited　by　its　poor　charge　transport　and　wide　bandgap.　In　this　study,　F-doped　TiO2　nanorod　arrays　were　synthesized　using　a　simple　chemical　bath　annealing　method,　which　resulted　in　significantly　improved　properties.　Among　the　samples,　0.05F-T　(F-doped　TiO2　nanorods)　exhibited　the　best　performance,　with　a　photocurrent　of　7.34　mA/cm2　at　1.8　V　vs.　reversible　hydrogen　electrode　(RHE),　which　is　4.61　times　higher　than　that　of　pure　TiO2　nanorods　(1.59　mA/cm2).　Incident　photon-to-current　efficiency　measurements　showed　prominent　photocurrent　responses　in　the　325-375　nm　range　and　a　slight　redshift　toward　the　visible　region　around　425　nm,　indicating　improved　light　absorption.　The　electron-hole　separation　efficiency　was　enhanced,　and　bandgap　and　flat-band　potential　measurements　confirmed　the　optimization　of　the　energy　band　structure.　The　photoelectrochemical　performance　for　water　splitting　was　also　evaluated,　with　0.05F-T　achieving　the　highest　hydrogen　production　of　842.28　mu　mol/cm2　in　5　h　at　1.8　V　vs.　RHE,　which　is　6.58　times　higher　than　that　of　pure　TiO2　(128.05　mu　mol/cm2).　These　results　demonstrate　that　F-doped　TiO2　nanorods　are　promising　for　enhancing　photocatalytic　hydrogen　production.