The　research　focus　on　a　domestic　Double　Tauren　EDM　machine,　Analysis　of　the　deformation　of　the　spindle　head　Y　axial　and　Z　axial　in　the　machine　tool　by　simulation　analysis.　The　3D　model　is　built　and　simplified　by　Solidworks　software,　then　analysis　the　static　deformation　by　ANSYS　software.　In　considering　the　effect　of　gravity,　get　the　Y　axial　and　Z　axial　displacement　of　the　spindle　head　installation　datum　centroid　point　O.　By　changing　the　stroke　of　the　Y　axis　and　the　Z　axis,　the　deformation　data　corresponding　to　different　travel　are　obtained.　According　to　the　stroke-displacement　simulation　data,　the　stroke-deformation　curve　is　fitted,　and　the　corresponding　mathematical　expression　is　obtained　for　the　error　compensation.