A　novel　multistage　aging　heat-treatment　method　was　applied　to　investigate　the　microstructural　evolution　and　properties　of　an　additive-manufactured　2319　aluminum　alloy.　The　microstructure　and　mechanical　properties　were　analyzed,　and　the　results　revealed　that　the　as-built　annular-shaped　components　were　characterized　by　an　alternating　distribution　of　thin　equiaxed　crystals,　dendrites,　and　coarse　columnar　crystals.　The　microstructure　occurs　recrystallization　and　the　average　grain　size　decreased　after　the　two-stage　aging　treatment.　The　maximum　texture　strength　in　the　selected　area　increased　after　the　two-stage　aging　treatment,　and　the　angle　grain　bound-aries　were　evenly　distributed.　Solid　solution　plus　aging　could　significantly　improve　ultimate　tensile　strength　and　hardness.　The　tensile　fracture　morphology　was　typical　of　ductile　fracture.　Two-stage　aging　exhibited　a　higher　corrosion　resistance.