AlSi10Mg　alloy　was　prepared　by　laser　powder　bed　fusion　(LPBF).　The　evolution　of　microstructure　and　mechanical　properties　after　diverse　aging　temperatures　were　systematically　studied.　The　metastable　ultra-fine　cellular　structure　was　obtained　for　as-built　specimens.　Aging　at　lower　temperatures　(100-225　degrees　C)　promotes　the　formation　of　a　large　number　of　Si-rich　precipitates,　and　the　original　Si　networks　can　be　retained.　With　the　increase　in　aging　temperature,　Si　network　gradually　broke　apart,　and　Si-rich　particles　grew　and　spheroidised.　The　hardness　increases　with　temperatures　up　to　175　degrees　C,　and　decreases　thereafter,　while　the　opposite　trend　was　observed　for　elongation.　Excellent　comprehensive　mechanical　properties　with　a　tensile　strength　of　381　MPa　and　elongation　of　5.2%　can　be　obtained　at　225　degrees　C　for　2　h.