Precast　segmental　columns　have　been　frequently　applied　in　regions　of　low　seismicity　due　to　rapid　construction,　high　quality,　and　low　downtime.　Their　lateral　force-displacement　curves　were　always　calculated　using　iterative　models　in　former　studies,　which　could　be　time-consuming　and　arduous.　Whereas,　a　non-iterative　model　can　greatly　improve　computational　efficiency　and　is　preferred　by　designers.　In　this　study,　a　non-iterative　simplified　analytical　model　was　firstly　proposed　considering　different　neutral　axis　depths　of　the　rocking　interface.　The　neutral　axis　depth　approached　a　constant　value　during　lateral　loading　according　to　the　results　of　the　former　tests　and　numerical　studies.　Then,　a　quasi-static　test　and　finite　element　model　of　a　precast　segmental　concrete-filled　steel　tube　(PS-CFST)　column　were　conducted　to　verify　the　proposed　analytical　model.　Based　on　the　finite　element　model,　a　nonlinear　regression　equation　was　set　up　to　predict　the　constant　neutral　axis　depth　of　the　PS-CFST　column　according　to　the　simulation　results　of　48　cases.　Finally,　the　influence　of　the　initial　prestressing　force,　area　of　the　prestressed　tendons　and　gravity　load　on　the　lateral　force　capacity　of　the　PS-CFST　column　were　investigated.　It　was　concluded　that　the　constant　value　of　neutral　axis　depth　was　positively　related　to　axial　ratio　and　diameter-thickness　ratio,　and　negatively　related　to　yield　strength　of　steel　tube　of　PS-CFST　columns.　The　analytical　model　without　iteration　proposed　in　this　study　was　appropriate　to　predict　lateral　force　capacity　of　post-tensioned　precast　segmental　columns,　and　it　had　a　favorable　agreement　with　testing　and　numerical　results.　Furthermore,　the　precast　column　with　the　lower　gravity　load　and　the　higher　reinforcement　ratio　of　prestressed　tendons　would　result　in　the　larger　post-yield　stiffness.