Geopolymer　has　been　applied　to　accommodate　the　rapid　development　of　3D　printing　in　civil　engineering　practices　and　contributed　this　technique　to　reach　its　maximum　eco-friendly　potentials　by　eliminating　the　use　of　Portland　cement.　However,　inherent　problems　with　3D　printing　concrete　lie　in　the　low　tensile　strength　and　poor　ductility　due　to　non-reinforcement,　which　greatly　limit　the　application　of　3D　printing　materials　and　structures.　Hence,　this　study　experimentally　explores　the　feasibility　of　directly　entraining　a　continuous　micro　steel　cable　(1.2　mm)　during　filaments　(12　mm)　deposition　process,　forming　a　reinforced　geopolymer　composite　material.　Three　different　printing　path　configurations　are　deigned　to　verify　the　applicability　of　micro-cable　reinforced　geopolymer　composite　for　extrusion-based　3D　printing.　Flexural　bending　capacities　of　the　proposed　composite　is　measured　and　evaluated　through　four-point　bending　test.　The　results　prove　the　well　bonding　and　coordination　of　the　micro-cable　and　geopolymer.　Significant　improvement　of　mechanical　strength,　toughness　and　post-cracking　deformation　of　geopolymer　composite　are　demonstrated.　(C)　2018　Elsevier　B.V.　All　rights　reserved.