The　rocking　effect　severely　limits　the　application　of　three-dimensional　(3D)　seismic　isolators　to　structures　with　large　aspect　ratios.　To　fill　this　gap,　a　novel　multi-dimensional　earthquake　isolation　and　mitigation　device　(MEIMD)　is　proposed　in　this　study,　which　consists　of　a　viscoelastic　(VE)　bearing,　disc　spring-damper　elements　(DSDEs),　and　rocking　suppression　elements　(RSEs).　To　explore　the　mechanical　properties　of　the　MEIMD,　pseudo-static　tests　were　performed　and　equivalent　property　parameters　were　derived　under　different　displacement　amplitudes.　Further,　to　verify　the　effectiveness　of　the　MEIMD,　horizontal　shaking　table　tests　were　conducted　on　a　full-scale　four-story　frame　structure.　The　experimental　results　indicated　that　the　MEIMD　possessed　both　excellent　energy-dissipation　capacity　and　good　rocking　suppression　ability.　After　employing　the　MEIMD,　the　base　energy　input　and　the　top　acceleration　response　can　be　reduced　by　54　%　and　34　%　at　most　under　the　maximum　considered　earthquakes,　respectively.　Moreover,　due　to　the　nonlinear　rocking　stiffness　provided　by　the　RSEs,　the　maximum　rocking　rotation　angle　was　0.725　%,　much　lower　than　the　limit　value　of　1.5　%,　demonstrating　that　the　rocking　response　was　effectively　controlled.　Hence,　the　proposed　MEIMD　can　balance　the　seismic　isolation　efficiency　and　the　dynamic　stability　of　the　3D　isolation　system.　©　2025