To　explore　the　influence　of　post-tensioned　(PT)　tendon　parameters　on　the　seismic　performance　of　self-centering　precast　bridge　columns　and　further　promote　the　development　of　a　self-centering　precast　bridge　column　system　in　moderate　and　high　seismic　regions,　five　self-centering　precast　segmental　concrete-filled　steel　tube　(CFST)　bridge　columns　were　designed　in　this　study　considering　different　areas,　initial　PT　forces,　and　stress　losses　of　the　PT　tendons.　In　addition,　quasi-static　cyclic　loading　tests　were　conducted.　Based　on　the　experimental　results,　seismic　behaviors　such　as　the　damage　model,　PT　stress　losses,　retraction　of　the　anchorage　of　the　bridge　columns,　hysteretic　curves,　skeleton　curves,　energy-dissipative　capacity,　and　height　of　the　compression　zone　were　analyzed.　The　research　results　show　that　the　designed　precast　segmental　CFST　bridge　columns　exhibit　satisfactory　seismic　performance　and　self-centering　ability;　the　residual　drift　ratio　is　only　0.　41%,　and　no　apparent　damage　phenomenon　was　observed　under　the　maximum　horizontal　displacement　load.　Under　the　cyclic　horizontal　load,　the　value　of　the　PT　stress　losses　of　the　bridge　columns　is　12%-25%,　the　ratio　of　PT　stress　losses　caused　by　the　retraction　of　the　anchorage　is　70.　3%,　and　the　amplitude　of　the　retraction　of　the　anchorage　increases　as　the　loading　displacement　exceeds　the　historical　displacement.　Thus,　the　PT　tendon　should　be　over-tensioned　to　reduce　the　PT　stress　losses　due　to　the　retraction　of　the　anchorage.　The　horizontal　bearing　capacity　of　the　bridge　columns　significantly　positively　relates　to　the　initial　PT　force,　and　an　increase　in　the　area　of　the　PT　tendon　will　enhance　the　post-yielding　stiffness.　This　indicates　that　the　minimum　reinforcement　ratio　should　not　be　less　than　0.　8%.　Moreover,　the　initial　PT　force　and　area　of　the　PT　tendon　does　not　affect　the　height　of　the　compression　zone,　and　the　value　tends　to　remain　constant　in　the　later　stage　of　loading.　The　research　results　will　provide　a　reference　for　the　structural　design　and　optimization　of　self-centering　precast　segmental　CFST　bridge　columns.　©　2024　Chang＇an　University.　All　rights　reserved.