The　overall　conversion　of　carbon　dioxide　(CO2)　with　pure　water　to　hydrocarbons　is　one　of　the　most　challenging　reactions　in　the　field　of　photocatalysis.　Herein,　LaTiO2N　coupled　with　alpha-Fe2O3　is　reported　to　achieve　the　overall　conversion　of　gas　phase　CO2　without　sacrificial　agents　under　visible　light　irradiation.　The　optimal　alpha-Fe2O3/LaTiO2N　sample　exhibits　the　yields　of　CO　and　CH4　up　to　29.0　and　38.0　mu　mol　g(-1)　under　illumination　for　3　h,　with　a　total　utilized　photoelectron　number　(UPN)　of　362.0　mu　mol　g(-1).　The　superior　photocatalytic　performance　can　be　due　to　the　efficient　coupling　of　photocatalytic　CO2　reduction　and　H2O　oxidation　over　LaTiO2N　and　alpha-Fe2O3,　respectively.　Strong　evidence　of　Z-scheme　charge　transfer　pathway　is　illustrated　by　XPS,　photoelectrochemical　characterization,　TRPL,　Kelvin　probe　technique　(KP),　EPR　and　photoinduced　redox　probe　reactions.　This　work　is　expected　to　provide　new　insights　into　promoting　the　photocatalytic　performance　of　LaTiO2N　by　modulating　the　charge　carrier　dynamics.