In　this　poster,　we　proposed　a　refined　scheme　and　system　to　realize　the　multi-directional　3D　printing　with　the　strength　as　the　traditional　unidirectional　3D　printing.　With　the　introduction　of　the　10.6µm　CO2　laser,　the　printing　system　can　heat　the　interfaces　of　the　already　printed　components　and　increase　the　intermolecular-penetrating　diffusion　while　fabricating　the　base　layers　of　the　next　components.　Therefore,　the　interfacial　bonding　strength　between　components　is　augmented.　The　tensile　tests　demonstrate　that　the　interfacial　bonding　strength　can　be　increased　by　more　than　27%,　which　reaches　the　strength　of　the　integrated　ones.　The　improved　printing　system　makes　it　possible　to　realize　multi-directional　3D　printing　with　strength　retention.　©　2019　Copyright　held　by　the　owner/author(s).