The　application　of　prefabricated　concrete　columns　with　grouted　sleeves　(PCC-GSs)　in　moderate　and　high　seismic　regions　is　scarce　owing　to　a　lack　of　knowledge　about　their　seismic　performance.　In　this　study,　the　seismic　performance　of　PCC-GSs　was　systematically　investigated.　First,　3D　finite　element　analysis　(FEA)　models　were　established　and　validated　against　experimental　results.　Good　agreements　were　observed　between　the　FEA　and　experimental　results　in　terms　of　the　load　deformation　response　and　failure　modes.　Subsequently,　based　on　the　validated　modelling　method,　a　detailed　parametric　study　was　conducted　to　investigate　the　seismic　behaviours　of　PCCGSs,　including　the　grouted　sleeve　height,　axial　force　ratio,　shear　span　ratio,　longitudinal　reinforcement　ratio,　yield　strength　of　rebars,　concrete　strength,　and　hardening　stiffness　of　rebars.　Finally,　some　significant　recommendations　for　the　seismic　design　of　PCC-GSs　were　made　based　on　the　FEA　results.　Additionally,　a　simplified　calculation　method　was　proposed　to　evaluate　the　displacement　capacity　of　PCC-GSs.