It　is　very　essential　to　grow　efficient　and　abundant　photocatalysts　for　overall　water　cracking　to　produce　hydrogen.　Ni3FeN　nanosheets　were　synthesized　by　combining　simple　sol-gel　and　calcining　methods　using　urea　as　nitrogen　source.　A　heterostructure　was　constructed　between　Ni3FeN　and　g-C3N4　to　enhance　the　absorption　capacity　of　visible　light.　The　reformed　Z-scheme　Ni3FeN/g-C3N4　heterojunction　exhibited　an　excellent　visible-light　photocatalytic　activity.　The　average　hydrogen　evolution　rate　of　5　wt%　Ni3FeN/g-C3N4　composite　is　528.7　mu　mol　h(-1)　g(-1)　due　to　the　Z-scheme　Ni3FeN/g-C3N4　junction,　which　promotes　the　separation　of　photogenerated　e(-)/h(+).　Interestingly,　the　average　H-2　production　of　Ni3FeN/g-C3N4　is　nearly　8.3　and　3.6　times　higher　than　that　of　Fe4N/g-C3N4　and　Ni4N/g-C3N4,　respectively,　indicating　that　bimetallic　nitrides　as　cocatalysts　are　more　conducive　to　enhancing　the　performance　of　photocatalysts.　Importantly,　the　Ni3FeN/g-C3N4　composite　exhibited　good　cycle　stability,　and　the　hydrogen　production　performance　hardly　changed　after　four　cycle　experiments.　Furthermore,　photoluminescence,　electrochemical　impedance　spectroscopy,　and　transient　photocurrent　response　show　that　Ni3FeN/g-C3N4　heterojunction　improves　the　separation　efficiency　of　photoinduced　e(-)/h(+).　This　work　provides　a　feasibility　of　the　cocatalyst　Ni3FeN　for　use　in　photocatalytic　hydrogen　production.