Considering　the　corrosion　of　infrastructures　under　the　harsh　ocean　environment,　a　new　composite　structure　called　concrete,　confined　by　FRP-PVC　tubes,　is　proposed.　Although　lots　of　research　is　focused　on　the　static　behaviors　of　such　structures,　rare　research　on　the　performances　of　the　slender　columns　has　been　reported.　Therefore,　the　behavior　of　slender　concrete-filled　CFRP-PVC　tubular　columns　under　axial　compression　is　studied.　Four　specimens　with　different　slenderness　ratio　were　tested　and　compared　with　numerical　analysis　results　to　validate　the　effectiveness　of　the　analysis　method.　Factors,　such　as　the　number　of　CFRP　layer,　concrete　compressive　strength　and　the　slenderness　ratio,　that　will　affect　the　performance　are　investigated　by　the　developed　method.　Finally,　the　typical　φ-λ　relation　curve　and　the　bearing　capacity　formula　are　proposed　for　the　CFRP-PVC　confined　concrete　columns.　The　results　show　that　the　axial　load　decreases　with　the　slenderness　ratio　and　the　bearing　capacity　increases　when　the　CFRP　layer　or　concrete　compressive　strength　grows.　However,　the　concrete　strength　increases　less　when　the　number　of　CFRP　layers　adds　up　to　some　extent.　The　analytical　values　by　the　proposed　formula　agree　well　with　the　test　results,　which　indicate　that　the　proposed　formula　can　provide　reference　for　the　practical　engineering　analysis.