The　preparation　of　high　density　Al7000　series　Al　alloys　by　laser　powder　bed　fusion　(LPBF)　is　challenging.　In　this　work,　a　completely　crack-free　Al–Zn–Mg–Cu–Er–Zr　alloy　was　successfully　processed　by　LPBF.　The　effect　of　different　laser　power　and　scanning　speed　on　the　printability　of　the　alloy　was　investigated,　and　the　processing　window　was　optimized.　By　characterizing　the　microstructure　and　mechanical　properties　of　the　alloy　with　a　density　of　99.8　%,　it　is　found　that　microstructure　structure　consisting　of　equiaxed　grains　at　the　boundary　of　the　melt　pool　and　columnar　grains　inside　the　melt　pool.　Er　and　Zr　elements　participate　in　the　formation　of　equiaxial　grains　in　the　form　of　Al3Er,　Al3Zr　and　Al3(Er,Zr)　phases,　which　play　an　important　role　in　inhibiting　the　epitaxial　growth　of　columnar　grains.　The　as-built　alloy　achieved　an　elongation　of　17%,　with　yield　strength　and　ultimate　tensile　strength　of　310　MPa　and　368　MPa,　respectively.　©　2025　The　Authors