Graphene　oxide　(GO)　has　a　large　specific　surface　area,　and　there　are　a　large　number　of　oxygen-containing　groups　in　the　chemical　structure,　which　makes　it　have　excellent　hydrophilic　properties　and　dispersing　properties　in　cement-based　materials.　GO　can　effectively　improve　the　microstructure　of　cement-based　materials　and　enhance　its　mechanical　properties.　In　this　paper,　based　on　the　Dinger-Funk　model,　the　mix　ratio　design　of　3D　printing　cement-based　materials　was　carried　out,　and　the　effect　of　different　dosages　of　GO　on　the　properties　was　studied.　The　results　show　that:　The　addition　of　0.03wt%-0.05wt%GO　accelerates　the　cement　hydration　process,　which　is　beneficial　to　the　enhancement　of　the　mechanical　properties　of　3D　printed　cement-based　materials　in　all　directions.　Compared　with　the　group　without　GO,　after　adding　0.03wt%GO,　the　28　days　compressive　strength　of　the　3D　printed　specimens　in　the　X,　Y,　and　Z　directions　increase　by　12.07%,　11.93%,　and　17.42%,　respectively,　and　the　28　days　flexural　strength　increase　by　30.61%,　21.13%,　and　13.70%,　respectively.　The　pores　of　the　3D　printed　specimen　are　relatively　concentrated　at　the　interface　between　layers,　showing　an　irregular　shape,　resulting　in　anisotropic　behavior　of　the　mechanical　properties　of　the　3D　printed　specimens.　The　anisotropy　of　the　compressive　strength　of　the　3D　printed　specimen　is　not　obvious,　while　the　anisotropic　behavior　of　the　flexural　strength　is　significant.　©　2023　Beijing　University　of　Aeronautics　and　Astronautics　(BUAA).　All　rights　reserved.