The　confinement　on　concrete　core　by　the　steel　tube　is　the　main　advantage　of　concrete-filled　steel　tubular　(CFST)　column　under　compression.　However,　the　debonding　of　concrete　from　the　steel　tube　common　and　it　ruins　the　confinement　effect.　In　this　paper,　the　influence　of　debonding　on　the　behavior　of　CFST　stub　columns　subjected　to　eccentrically　loading　is　investigated　experimentally.　The　debonding　was　formed　by　inserting　galvanized　sheet　in　the　steel　tube　before　the　concrete　is　filled　and　pulling　them　out　after　5~6　hours.　The　test　validates　this　method　to　form　a　debonding　in　specimens.　The　parameters　in　the　tests　include　the　debonding　arc-length　ratio　and　steel　ratio.　All　the　specimens　failure　in　flexural　mode,　which　indicates　that　the　debonding　has　no　influence　on　the　failure　mode,　but　the　curvature　of　the　debonding　specimen　is　a　little　smaller　than　that　of　the　normal　specimen.　The　ultimate　load　capacity　and　the　ductility　of　the　specimens　are　significantly　decreased　with　the　increase　of　debonding　arc-length　ratio,　which　can　be　relieved　by　a　larger　steel　ratio.