In　this　paper,　major　factors　and　their　correlation　effects　are　decided　which　influence　surface　waviness　in　ground　bearing　race,　based　on　analyzing　mechanism　of　grinding　internal　race　for　bali　bearing.　According　to　mixed　orthogonal　table,　the　multiple-factor　experiment　is　done.　The　optimal　regression　equations　are　established　through　modeling　experimental　data　by　stepwise　regress.　Through　doing　further　multidimensional　analysis　of　mathematical　model,　it　comes　to　some　important　conclusions.