To　economically,　effectively　and　reasonably　apply　engineered　cementitious　composites　(ECC)　on　improving　the　mechanical　properties　of　reinforced　concrete　(RC)　column,　a　novel　composite　column　consisting　of　precast　concrete　core　and　precast　steel　reinforced　ECC　shell　(SECC-PC　composite　column)　was　developed　in　this　paper.　SECC-PC　composite　column　specimens　as　well　as　the　contrast　pure　RC　column　and　pure　ECC　column　specimens　were　designed　and　manufactured.　The　axial　compression　tests　were　conducted　to　investigate　the　axial　compression　behaviours　of　the　specimens.　And　the　influence　law　of　ECC　shell　thickness　and　stirrup　spacing　on　the　axial　compression　behaviours　of　the　specimens　was　systematically　analyzed.　Based　on　this,　the　calculation　equation　of　axial　compressive　bearing　capacity　of　the　composite　columns　considering　the　additional　confinement　effect　of　the　stirrup　and　ECC　shell　was　established.　The　results　show　that,　compared　with　the　RC　column,　the　SECC-PC　composite　columns　and　ECC　column　exhibit　obvious　ductile　failure　characteristic,　and　no　ECC　spalling　and　no　segregation　phenomena　between　the　precast　ECC　shell　and　concrete　core　occur　at　failure　state.　With　the　ECC　shell　thickness　increasing,　the　peak　load　and　displacement　of　the　precast　composite　columns　increase,　while　the　relevant　initial　stiffness　and　ductility　coefficient　decrease.　The　incorporation　of　the　precast　ECC　shell　can　significantly　improve　the　ductility　and　energy　dissipation　capacity　of　the　specimens.　Within　the　designed　ECC　shell　thickness　in　this　study,　the　ductility　coefficients　and　the　accumulated　energy　dissipation　of　the　precast　composite　columns　are　1.13-1.35　times　and　2.13-2.46　times　larger　than　that　of　the　RC　column.　With　the　stirrup　spacing　decreasing,　the　bearing　capacity　improves,　while　the　post-peak　ductility　and　energy　dissipation　capacity　of　the　specimens　improve　remarkably.　The　axial　compressive　bearing　capacity　of　the　composite　column　should　take　the　constraint　effect　of　the　prefabricated　ECC　shell　into　account.　The　relevant　bearing　capacity　calculation　equation　can　be　used　to　calculate　the　axial　compressive　bearing　capacity　of　the　composite　column.　©　2024　Beijing　University　of　Aeronautics　and　Astronautics　(BUAA).　All　rights　reserved.