The　primary　objective　of　this　study　is　to　carry　out　an　investigation　on　feasibility　and　efficiency　of　a　new　type　of　SMA-based　isolator　in　seismic　isolation　of　lattice　shells.　The　proposed　isolator　entitled　as　multidimensional　SMA　spring-friction　bearing　(MSFB),　consists　of　a　flat　sliding　bearing　and　lateral　restrainer　made　up　of　several　SMA　helical　springs　located　all　around　the　device　which　is　to　be　restrained.　The　conceptual　design　and　the　functioning　mechanism　of　the　MSFB　are　briefly　described.　Then,　the　12mm　bar　diameter　SMA　helical　spring　made　of　NiTi　alloy　was　manufactured,　and　a　preliminary　tension-compression　axial　experimental　study　was　conducted　to　measure　its　force-displacement　relationships.　Next,　a　computational　model　is　developed　to　simulate　the　overall　response　of　the　MSFB　isolators.　Finally,　the　MSFB　isolators　are　applied　to　a　double-layer　spherical　lattice　shell　structure.　The　nonlinear　time　history　analyses　are　performed　to　examine　the　response　of　the　seismically　excited　double-layer　spherical　lattice　shells　considering　different　seismic　inputs.　The　results　show　that　the　MSFB　isolator　can　reduce　the　seismic　responses　of　the　structure　effectively,　which　indicates　the　effectiveness　of　the　proposed　isolation　system.