The　development　and　application　of　prefabricated　assembly　technology　has　become　an　important　measure　to　achieve　industrial　optimization　and　upgrading　and　sustainable　development　of　construction　engineering.　The　application　of　prefabricated　assembly　technology　in　underground　engineering　is　in　its　infancy,　and　the　seismic　research　on　prefabricated　underground　structures　is　scarce.　Therefore,　this　paper　establishes　refined　finite　element　models　(FEMs)　of　prefabricated　and　cast-in-place　underground　structures　based　on　an　actual　project　of　a　subway　station.　The　developed　FEMs　are　used　to　conduct　a　series　of　seismic　time-history　analyses　considering　soil-structure　interaction　to　compare　the　responses　of　a　prefabricated　underground　structure　with　rigid　splicing　joints　or　non-rigid　splicing　joints　with　that　of　a　cast-in-place　underground　structure　of　the　same　structural　form.　In　addition,　the　influence　of　the　splicing　properties　of　different　parts　on　the　inter-story　displacement　and　internal　forces　of　the　prefabricated　underground　structure　are　systematically　investigated.　Tt　was　found　that　the　inter　-story　displacement　and　component　deformation　for　prefabricated　underground　structures　with　rigid　joints　are　basically　the　same　as　those　of　the　cast-in-place　underground　structure;　however,　both　the　internal　force　and　damage　at　the　bottom　of　center　column　decrease　slightly.　On　the　other　hand,　prefabricated　underground　structures　with　non-rigid　splicing　joints　experience　a　slight　increase　(less　than5%)　in　inter-story　displacement,　but　more　obvious　mid-span　deflection　of　the　laminated　slab.　However,　the　internal　force　response　and　damage　degree　of　their　center　column　are　significantly　reduced　compared　to　cast-in-place　structures.　It　was　also　revealed　that　the　bonding　strength　of　new-old　concrete　interface　of　the　horizontal　laminated　components　is　the　main　factor　that　reduces　the　lateral　stiffness　and　causes　redistribution　of　the　prefabricated　underground　structures＇　internal　forces.