Abstract:　In　order　to　isolate　direct　disturbances　exerted　on　payload　and　to　improve　damping　properties　of　an　isolation　system　for　purpose　of　avoiding　resonances,　a　hyper-damping　vibration　isolator　was　developed　based　on　a　magnetic　negative　stiffness　mechanism.　The　mechanism　consisted　of　a　magnetic　negative　stiffness　spring　(MNSS)　and　two　pairs　of　pre-pressured　mechanical　springs.　MNSS　included　five　magnetic　rings　axially　magnetized,　inclined　magnetic　rings　were　symmetrically　mounted　on　the　base,　while　a　moving　ring　was　constrained　by　two　pre-pressured　mechanical　springs　and　was　allowed　to　oscillate　along　the　axial　direction.　The　analytical　expressions　for　magnetic　restoring　force　and　magnetic　negative　stiffness　were　further　deduced　according　to　the　current　model.　By　repositioning　the　stiffness　and　damping　elements　of　the　vibration　isolation　system,　the　vibration　isolation　system　was　deigned　to　be　a　hyper-damping　device　with　the　same　static　stiffness,　the　same　damping　and　the　same　mass　as　those　of　a　typical　linear　reference　system.　The　impacts　of　stiffness　elements,　damping　ones　of　the　device　and　added　mass　of　magnet　on　the　damping,　natural　frequencies　of　the　designed　system　and　vibration　responses　of　the　main　system　were　deeply　analyzed.　The　results　showed　that　the　proposed　vibration　isolation　system　has　high　stiffness　and　hyper　damping　characteristics　and　it　can　effectively　suppress　vibrations　of　the　main　system;　the　response　of　the　main　system　converges　to　that　of　the　linear　reference　system　in　a　higher　frequency　range.　©　2017,　Editorial　Office　of　Journal　of　Vibration　and　Shock.　All　right　reserved.