In　this　study,　a　machining　error　compensation　method,　not　involving　comprehensive　error　modelling,　for　symmetric　free　form　components　was　proposed.　First,　the　coordinate　values　of　the　generatrix　were　calculated　according　to　the　paraboloid　equation　in　order　to　establish　a　3D　model.　After　the　machining　process　was　completed,　the　coordinate　values　of　the　paraboloid　were　measured　by　an　ultra-precision　coordinate　measuring　machine　(CMM).　Next,　the　coordinate　values　of　the　contour　points　on　the　generatrix　of　the　machined　surface　were　measured,　and　the　corresponding　machining　errors　were　extracted.　The　compensation　process　was　conducted　in　the　normal　direction,　and　the　machining　error　compensation　values　were　decomposed　into　two　respective　coordinate　directions.　Then,　the　coordinate　values　of　the　new　generatrix　were　generated.　This　was　followed　by　programming　a　new　machining　process　according　to　the　newly　refactored　3D　model.　The　finishing　processes　were　repeated　again　under　the　same　clamping　conditions,　tool　paths,　and　machining　parameters.　Finally,　the　coordinate　values　of　the　paraboloid　were　measured　again.　The　results　indicated　that　the　form　error　could　be　reduced　to　4.5　μm　from　44.4　μm　after　just　one　compensation　cycle,　which　validated　the　effectiveness　of　the　comprehensive　machining　error　compensation　method.　Copyright　©　Proceedings　of　the　20th　International　Conference　of　the　European　Society　for　Precision　Engineering　and　Nanotechnology,　EUSPEN　2020.　All　rights　reserved.