This　paper　presents　an　experimental　study　of　concrete　filled　steel　tubular　(CFST)　stub　columns　strengthened　with　carbon　fiber　reinforced　polymer　(CFRP)　composites　subjected　to　axial　compression.　Twenty　specimens　were　tested　to　investigate　the　effects　of　steel　tube　shape,　number　of　CFRP　layers　and　steel　wall　thickness　on　the　performance　of　the　composite　columns.　The　test　results　indicated　that　the　CFRP　jackets　enhanced　the　load-bearing　capacity　for　the　circular　columns　effectively,　whereas　the　enhancement　was　less　significant　for　square　columns.　A　simple　model　is　proposed　in　this　paper　to　calculate　the　ultimate　strength　of　square　CFST　stub　columns　wrapped　with　CFRP.　The　predicted　results　are　generally　in　good　agreement　with　the　experimental　results.