To　fully　exploit　the　preponderance　of　three-dimensional　(3D)-printed,　continuous,　fiber-reinforced,　thermoplastic　composites　(CFRTPCs)　and　self-reinforced　composites　(which　exhibit　excellent　interfacial　affinity　and　are　fully　recyclable),　an　approach　in　which　continuous　fiber　self-reinforced　composites　(CFSRCs)　can　be　fabricated　by　3D　printing　is　proposed.　The　influence　of　3D-printing　temperature　on　the　mechanical　performance　of　3D-printed　CFSRCs　based　on　homogeneous,　continuous,　ultra-high-molecular-weight　polyethylene　(UHMWPE)　fibers　and　high-density　polyethylene　(HDPE)　filament,　utilized　as　a　reinforcing　phase　and　matrix,　respectively,　was　studied.　Experimental　results　showed　a　qualitative　relationship　between　the　printing　temperature　and　the　mechanical　properties.　The　ultimate　tensile　strength,　as　well　as　Young＇s　modulus,　were　300.2　MPa　and　8.2　GPa,　respectively.　Furthermore,　transcrystallization　that　occurred　in　the　process　of　3D　printing　resulted　in　an　interface　between　fibers　and　the　matrix.　Finally,　the　recyclability　of　3D-printed　CFSRCs　has　also　been　demonstrated　in　this　research　for　potential　applications　of　green　composites.