The　hierarchical　porous　lattice　implant　with　microscopic　porosity,　which　resembles　the　original　human　bone　structure,　has　significant　potential　application　value.　The　microscopic　porosity　in　the　hierarchical　porous　lattice　implant　plays　a　crucial　role　in　transporting　nutrients　and　promoting　tissue　regeneration.　However,　it　is　difficult　to　fabricate　microscopic　pores　smaller　than　200　μm　by　powder　bed　fusion　(PBF)　processes　due　to　the　limitations　of　the　laser　spot　size.　In　this　study,　the　preparation　of　a　hierarchical　porous　lattice　implant　with　microscopic　porosity　is　proposed　by　coupling　structure　design　with　the　high　scanning　speed　-　short　hatch　spacing　(HSSH)　process　formation.　The　structure-versus-process　relationship　is　used　to　control　the　size　and　distribution　of　the　microscopic　pores,　which　meets　the　requirements　of　modulus　and　high　biocompatibility.　This　proposed　process　breaks　the　inherent　law　where　the　higher　the　porosity,　the　higher　the　modulus　of　the　lattice　for　the　same　lattice　type.　The　modulus　and　porosity　of　the　hierarchical　porous　implants　could　be　flexibly　tuned　over　a　wide　range　(0.1–1.8　GPa　and　63–84　%,　respectively).　The　microscopic　porosity　is　mainly　distributed　near　the　contour　of　the　core　rod,　and　the　macroscopic　porosity　and　microscopic　porosity　are　approximately　73.70　%　and　8.22　%,　respectively.　The　problem　of　large　errors　in　fitting　the　hierarchical　porous　lattice　modulus　calculation　model　according　to　the　Gibson-Ashby　equation　has　been　solved.　The　mechanism　of　microscopic　porosity　formation　was　also　analyzed.　Furthermore,　this　method　has　the　advantage　of　universal　applicability,　providing　a　feasible　way　for　the　development　and　application　of　porous　materials.　©　2024　The　Society　of　Manufacturing　Engineers