The　work　aims　to　study　the　precision　and　ultra　precision　mirror　grinding　experiment　of　ZGMn13Cr2　high　manganese　steel　by　ELID　grinding　technology　to　solve　the　problem　of　poor　processing　performance　and　to　improve　its　surface　quality　and　then　use　the　quadratic　regression　universal　rotation　design　test　to　explore　the　influence　of　different　test　factors　on　the　surface　quality　of　ZGMn13Cr2　high　manganese　steel,　and　optimize　the　process　parameters　of　each　factor.　The　sample　with　diameter　of　50　mm　and　thickness　of　10　mm　was　processed　by　ELID　with　metal　bonded　diamond　wheel　with　grain　size　of　240#　and　W10　after　the　modularization　of　ELID　grinding　process　for　MSG612-CNC　ultra　precision　forming　surface　grinder　to　compare　the　processing　effects　of　two　kinds　of　grinding　wheels.　The　process　test　was　carried　out　by　the　universal　rotary　design　of　quadratic　regression.　Then,　the　mathematical　model　of　quadratic　regression　of　surface　roughness　was　built　to　explore　the　influence　degree　of　different　test　factors　on　the　surface　quality　of　workpiece.　Decision　coefficient　R2　was　used　to　test　the　fitting　degree　of　quadratic　regression　model　to　the　actual　situation.　At　last,　LINGO　software　was　used　to　optimize　the　quadratic　regression　mathematical　model　to　get　the　best　combination　of　process　parameters　of　various　experimental　factors　in　the　ELID　grinding　of　ZGMn13Cr2　high　manganese　steel.　After　machining　with　W10　metal　bonded　diamond　wheel,　the　sample　had　a　high　precision　mirror　effect,　and　there　was　no　burn　on　the　surface　of　the　sample　processed　with　two　particle　sizes.　The　fitting　degree　of　the　quadratic　regression　model　to　the　actual　situation　was　99.24%,　and　the　prediction　results　of　the　model　were　instructive　to　the　actual　machining.　The　optimum　technological　parameters　of　grinding　wheel　were　obtained,　with　linear　speed　of　35　m/s,　electrolytic　voltage　of　90　V,　grinding　wheel　feed　of　2　μm　and　electrolytic　clearance　of　0.734.　ELID　Precision　mirror　grinding　technology　can　greatly　improve　the　processing　efficiency　and　accuracy　of　ZGMn13Cr2　high　manganese　steel,　reduce　the　surface　burn　and　crack　of　workpiece,　and　has　good　application　value　in　the　grinding　of　high　manganese　steel.　©　2020,　Chongqing　Wujiu　Periodicals　Press.　All　rights　reserved.