Considering　the　wear　in　mechanical　bearings　and　the　requirement　for　sensors　or　electrical　power　in　active　magnetic　bearings,　a　novel　nutation　blood　pump　using　a　passive　magnetic　spherical　bearing　was　developed　in　this　paper.　A　mathematical　model　was　derived　to　calculate　the　magnetic　forces　of　the　bearing　between　two　pairs　of　magnetic　sleeves　in　the　nutation　process.　The　calculation　results　demonstrate　that　the　fluctuations　of　magnetic　forces　enlarge　with　the　increase　in　the　nutation　angle;　the　magnetic　forces　obviously　increase　with　the　decrease　in　the　air　gap,　especially　along　the　z-axis.　The　dynamic　magnetic　finite　element　simulation　was　carried　out　to　validate　the　mathematical　model.　The　simulation　and　calculation　results　of　the　magnetic　forces　show　consistent　trends　and　provide　a　theoretical　basis　for　the　parameter　design.　To　validate　the　performance　of　the　pump,　computational　fluid　dynamics　(CFD)　analyses　and　in　vitro　experiments　were　conducted.　The　predicted　values　of　the　flow　velocity　vector　through　the　pump,　and　the　wall　shear　stress,　demonstrate　that　the　pump　has　an　antithrombotic　property　and　would　not　cause　serious　blood　damage.　The　hydraulic　experiment　shows　that　a　pressure　rise　can　be　achieved　in　the　range　of　60-140　mmHg,　at　a　rotational　speed　of　600-1600　rpm　and　a　flow　rate　of　0.4-6.7　L/min.　The　normalized　index　of　hemolysis　(NIH)　of　the　nutation　pump　was　0.0043　±　0.0008　g/100L.　The　in　vitro　tests　indicate　the　feasibility　of　a　magnetically　levitated　ventricular-assist　nutation　blood　pump　for　further　suspension　stability　and　animal　trials.　©　2013　IEEE.