In　the　present　study,　the　6061　alloy　was　chosen　as　base　alloy,　and　micro-alloying　effect　of　different　ratios　of　Er　and　Zr　(2:1,　1:1)　on　microstructure　evolution　and　mechanical　properties　was　examined　after　T6　heat　treatment.　Hot　rolling　deformation　was　carried　out　at　450℃,　then　a　solution　aging　heat　treatment　process　was　adopted　at　570℃/0.5h+180℃/5h.　The　precipitation,　recrystallization　behaviors　were　characterized　using　transmission　electron　microscopy(TEM),　scanning　electron　microscope(SEM)　and　electron　backscattered　diffraction(EBSD)　techniques,　the　mechanical　properties　were　tested　using　tensile　tests.　The　results　shown　that　recrystallization　behavior　was　inhibited　by　co-additions　of　Er　and　Zr.　With　the　increase　of　Er　and　Zr　content,　the　recrystallized　grain　size　and　coarse　Fe-rich　phases　at　the　grain　boundaries　decreased,　the　recrystallized　grain　distributed　uniformly,　the　number　of　needle-like　Mg2Si　and　granular　Al3(Er,　Zr)　phases　gradually　increased.　In　6061　alloy　with　Er/Zr　ratio　of　1,　the　distribution　of　precipitates　were　finer　and　more　uniform,　The　uniformly　distributed　Al3(Er,　Zr)　phases　pinned　the　grain　boundaries,　which　effectively　hindered　the　movement　of　grain　boundaries.　The　tensile　tests　exhibited　that　the　properties　of　6061　alloy　with　Er/Zr　ratio　of　1　reached　the　highest　level,　i.e.,　tensile　strength　of　344.0MPa,　the　yield　strength　of　296.0MPa,　and　elongation　of　17%.　©　2021　Institute　of　Physics　Publishing.　All　rights　reserved.