In　this　study,　seven　AlSi10Mg　bulks　with　different　construction　angles　(0　degrees,　15　degrees,　30　degrees,　45　degrees,　60　degrees,　75　degrees,　and　90　degrees)　were　fabricated　by　selective　laser　melting　(SLM).　The　effects　of　different　construction　angles　on　the　microstructure　and　mechanical　properties　of　AlSi10Mg　alloys　were　investigated.　Increasing　the　construction　angle　changed　the　laser　track　segments　from　an　ellipse　to　a　semi-ellipse　and　then　to　fish-scale,　specifically　again　from　a　semi-ellipse　to　an　ellipse,　due　to　the　decrease　of　the　laser　radiation　area.　Meanwhile,　the　grains　in　the　vertical　planes　changed　from　columnar　grains　to　irregularly　arranged　grains,　and　then　to　equiaxed　grains.　The　45　degrees　sample　exhibited　the　highest　hardness　of　154.44　HV0.1.　The　60　degrees　sample　had　a　good　combination　of　strength　and　plasticity　with　a　tensile　strength　of　463.54　MPa,　yield　strength　of　283.37　MPa,　and　elongation　of　9.25%.　The　observed　mechanical　property　anisotropy　of　the　current　AlSi10Mg　alloy　was　a　result　of　the　pores,　equiaxed　grain　structure,　ultra-fine　equiaxed　sub-grains,　and　working　hardening.　In　addition,　the　difference　in　the　sample　microstructures　was　attributed　to　the　construction　angles　and　deposited　layer　area.　(C)　2021　Elsevier　B.V.　All　rights　reserved.