The　concrete-filled　round-ended　steel　tubular　(CFRST)　column　has　the　advantages　of　aesthetical　appearance,　flexible　sectional　arrangement,　high　strength　and　convenient　construction.　It　has　been　used　in　practical　engineering.　In　order　to　investigate　the　behavior　of　the　CFRST　slender　column　under　eccentric　compression,　tests　of　12　CFRST　columns　under　eccentric　compression　were　carried　out.　The　main　parameters　included　eccentricity　and　slenderness　ratio.　The　test　results　indicate　that　the　increase　of　the　eccentricity　and　slenderness　ratio　induce　the　decreasing　of　load-bearing　capacity　and　the　increasing　of　ductility.　Before　the　peak　load,　the　confinement　effect　of　the　round-ended　steel　tube　on　core　concrete　is　established.　After　the　peak　load,　the　local　buckling　of　the　steel　tube　is　observed.　During　the　whole　test,　the　mid　cross-section　of　the　CFRST　column　always　keeps　as　a　plane.　The　deflection　curve　of　the　CFRST　column　is　close　to　the　sinusoidal　half-wave.　Then,　the　FE　model　was　developed.　The　FE　results　agreed　well　with　experimental　results.　The　parametric　analysis　was　conducted.　The　results　show　that　the　stability　coefficient　decreases　with　the　increase　of　the　steel　yield　strength,　slenderness　ratio　and　concrete　strength.　The　concrete　strength,　steel　ratio,　slenderness　ratio　and　steel　yield　strength　have　great　influences　on　the　relative　axial　load　versus　relative　moment　curves.　Finally,　based　on　the　parameter　analysis,　simplified　models　were　improved　to　predict　the　load-bearing　capacity　of　the　CFRST　slender　column　under　axial　and　eccentric　compression.　The　predictions　by　the　simplified　models　agree　well　with　the　measured　results　and　the　FE　predictions.　©　2022,　Editorial　Office　of　Journal　of　Building　Structures.　All　right　reserved.