The　remarkably　enhanced　mechanical　performance　of　Mg-8Gd-1Er-0.5Zr　alloy　with　lower　rare-earth　content　was　achieved　on　the　route　of　extrusion,　rolling　and　aging　processes　in　the　present　investigation.　Results　indicated　that　the　ultrahigh　UTS　of　560　MPa　and　YTS　of　518　MPa　as　well　as　elongation　of　4.8%　at　ambient　temperature　were　obtained.　The　beta　phase　with　size　of　100-200　nm　was　precipitated　during　rolling　in　accompany　with　refined　grains　and　strong　basal　texture,　and　the　layer-structured　precipitates　with　nanoscale　were　formed　during　aging.　The　fine　beta　phase　coordinating　with　strong　basal　texture　as　well　as　fine　grain　size　controlled　the　mechanical　performance　of　the　rolled　alloy,　whereas　the　layer-structured　precipitates　contributed　to　the　remarkably　enhanced　mechanical　properties　of　the　aged　alloy.　(C)　2017　Elsevier　B.V.　All　rights　reserved.