In　order　to　investigate　the　performance　of　the　high-speed　electric　spindle,　the　static　and　dynamic　characteristics　of　the　spindle　are　analyzed　by　using　the　finite　element　analysis　method　in　this　paper.　For　obtaining　the　static　deformation　and　static　stiffness　of　the　spindle,　static　analysis　of　the　spindle　is　carried　out　based　on　a　simpLified　static　analysis　model　through　using　the　software　of　ANSYS.　The　natural　frequencies　and　mode　shapes　of　the　electric　spindle　have　also　been　obtained　by　using　modal　analysis　method　based　on　ANSYS.　Furthermore,　the　influences　of　the　spindle　span　on　the　natural　frequencies　of　the　electric　spindle　are　studied　in　this　paper.　The　results　are　shown　that　he　finite　element　analysis　method　based　on　ANSYS　is　vaLid　for　the　static　and　dynamic　analysis.　©　2011　IEEE.