In　order　to　explore　the　new　way　to　precision　machining　of　the　cylindrical,　ELID　precision　mirror　grinding　technology　are　adopted　to　precision　and　ultra-precision　grinding　experiments.Based　on　the　ELID　precision　mirror　grinding　technology　has　effectively　solved　the　flat-precision　machining　and　efficient　processing　of　a　lot　of　the　typical　difficult　materials,we　refitted　machine　process　equipment　of　machine　tool　and　process　parameters　optimization,obtained　when　the　wheel　speed　in　16　∼　20　m/s,　the　grinding　depth　10μm,　cylindrical　grinding　state　is　best,　which　could　obtain　Ra0.025μm　surface　roughness　of　the　machined　surface.　©　(2014)　Trans　Tech　Publications,　Switzerland.