10　square　columns　with　different　lithium　slag　(LS)　content　were　designed　and　tested　under　axial　load　condition　to　investigate　the　compressive　behavior　of　lithium　slag　concrete　filled　steel　tube　(LSCFST)　short　columns　externally　confined　by　CFRP　strips.　It　is　found　in　this　paper　that　the　failure　mode　of　CFRP　strips　confined　square　LSCFST　stub　column　is　CFRP　strip　fracture　and　local　buckling　of　square　steel　tube.　The　confinement　of　CFRP　strips　is　able　to　limit　dilation　tendency　of　columns,　more　layers　and　smaller　spacing　allow　their　bearing　capacity　to　obtain　a　greater　enhancement　rate.　And　columns　with　LS　replacement　rate　of　20%　have　the　best　bearing　capacity,　ductility　and　initial　stiffness.　A　calculation　method　for　the　ultimate　strength　of　this　kind　of　columns　was　put　forward　eventually.