To　solve　the　camshaft＇s　deformation　compressed　by　the　continuous　and　variable　force　when　grinding,　the　influence　of　grinding　force　on　the　cam＇s　curve　accuracy　was　analyzed.　The　axial　deformation　and　radial　deformation　were　decoupled.　The　deformation　value　solution　equation　in　variable　position　and　angle　was　deduced.　The　interpolation　principle　of　the　CNC　(computer　numerical　control)　camshaft　grinder　was　analyzed.　The　X-C　linkage　kinematics　equation　which　included　deformation　errors,　workpiece　rotation　axis,　and　grinding　wheel　axis　was　built.　The　soft　error　compensation　manner　by　adding　the　errors　to　the　interpolation　value　was　proposed.　The　deformation　error　of　one　intake-exhaust　camshaft　was　modeled　and　simulated.　The　CNC　camshaft　grinder　was　compensated　and　the　manufacturing　test　was　executed.　The　simulation　and　manufacturing　result　showed　that　camshaft＇s　contours　accuracy　was　improved　5　μm　by　the　deformation　compensation.