Engineered　cementitious　composites　(ECCs)　have　excellent　crack　control　capacity　and　pseudo-strain-hardening　behaviour.　They　can　be　used　to　improve　the　damage-tolerant　capacity　of　vulnerable　parts　of　structures.　To　improve　the　seismic　performance　of　a　traditional　prefabricated　column　connected　with　grouted　sleeves　(GSs),　an　innovative　prefabricated　ECC　shell–reinforced　concrete　(RC)　composite　column　with　GSs　(ECC–PRC–GSs)　is　proposed　in　this　paper.　Then,　three-dimensional　nonlinear　finite　element　models　of　the　ECC–PRC–GSs　are　established　and　validated　with　previous　experimental　results.　Subsequently,　parametric　analysis　of　the　ECC–PRC–GSs　is　systematically　performed　to　assess　the　seismic　performance　of　ECC–PRC–GSs.　Notably,　certain　important　design　suggestions　for　the　ECC–PRC–GSs　are　proposed.　Finally,　a　theoretical　model　is　developed　to　predict　the　flexural　bearing　capacity　of　ECC–PRC–GSs　based　on　the　strain　compatibility　and　force　equilibrium　conditions.　The　effectiveness　of　the　model　is　verified　through　finite　element　analysis　and　experimental　results.　©　2023　Elsevier　Ltd