In　order　to　overcome　the　large　residual　deformation　of　regular　buckling-restrained　braces　under　strong　earthquake　excitations,　a　novel　disc-spring　self-centering　buckling-restrained　brace　(DS-SCB)　is　invented,　and　the　construction　and　mechanism　of　the　novel　DS-SCB　are　presented.　The　DS-SCB　consists　of　buckling-restrained　brace　(BRB)　system　and　self-centering　(SC)　system　in　parallel,　which　can　realize　different　hysteresis　characteristic　curves　by　controlling　the　pre-pressure　of　the　combined　disc-spring　and　the　yield　force　of　the　steel　core.　Three　different　types　of　DS-SCBs　were　fabricated,　the　quasi-static　tests　were　carried　out　and　failure　characteristics　of　DS-SCBs　were　analyzed.　The　residual　displacement　and　hysteretic　energy　dissipation　were　discussed　and　the　hysteretic　restoring　force　model　was　proposed.　The　experimental　results　show　that　the　DS-SCB　has　good　energy　dissipation　capacity　and　can　control　the　residual　deformation　effectively.　The　simulation　results　based　on　restoring　force　model　proposed　in　this　paper　have　good　agreement　with　the　experimental　data.　The　novel　DS-SCB　is　a　good　energy　dissipation　device　with　stability　behavior　and　lessresidual　deformation.　©　2018,　Engineering　Mechanics　Press.　All　right　reserved.