To　investigate　the　reinforcement　effect　of　external　CFRP　strengthening　on　pultruded　concrete-filled　GFRP　tubular　(CFGT)　short　columns　under　axial　compression,　a　total　of　60　specimens　were　axially　tested,　including　48　specimens　strengthened　with　different　layers　of　CFRP　and　12　specimens　without　CFRP　strengthening.　The　main　parameters　considered　in　this　study　consist　of　the　height　of　the　column,　concrete　strength,　and　strengthening　layers　of　CFRP.　The　failure　modes,　ultimate　strength,　load-displacement　curves,　load-strain　curves,　initial　stiffness,　and　ductility　of　all　specimens　were　obtained　and　discussed.　Test　results　indicate　that　the　specimens　unstrengthened　with　CFRP　are　failed　with　the　brittle　failure　under　axial　compression.　The　failure　modes　of　specimens　gradually　change　from　the　brittle　failure　to　ductile　failure　with　the　increase　of　strengthening　layers　of　CFRP.　Compared　with　the　unstrengthened　CFGT　short　columns,　the　ultimate　strength,　deformability,　and　ductility　of　columns　strengthened　with　CFRP　are　significantly　enhanced.　The　more　strengthening　layers　of　the　CFRP　has,　the　larger　the　ultimate　strength　of　specimens　is.　However,　the　strengthening　layers　of　CFRP　have　little　effects　on　the　initial　stiffness　of　CFGT　short　columns.　Among　the　above　three　parameters,　the　strengthening　layers　of　CFRP　exert　the　most　significant　and　positive　influence　on　the　ultimate　strength　of　specimens,　while　the　influence　of　the　column　height　is　completely　adverse.　Based　on　the　experimental　achievements,　a　formula　for　the　calculation　of　ultimate　strength　of　pultruded　CFGT　short　columns　externally　strengthened　with　CFRP　is　proposed,　which　shows　great　accuracy　and　rationality　in　comparison　with　the　experimental　results.