During　milling　of　free-form　surfaces,　cutting　force　varies　due　to　the　variation　of　workpiece　surface　curvature,　which　can　seriously　affect　machining　quality.　In　this　study,　a　layered　strategy　was　proposed　for　flexible　machining　of　complex　parts　with　variable　curvatures.　By　taking　a　blade　as　the　research　object,　we　first　considered　a　constant　cutting　force　as　the　starting　point.　The　relationship　between　the　machining　allowance　and　the　radius　of　curvature　of　the　workpiece　under　a　certain　cutting　force　was　established.　By　analyzing　the　curvature　of　each　position　of　the　blade,　a　reasonable　cutting　allowance　was　set　for　each　layer　and　the　machining　process　was　carried　out　layer　by　layer,　such　that　a　stable　cutting　force　was　maintained　on　the　workpiece　surface　during　machining　of　each　layer.　Second,　the　blade　surface　deformation　law　was　determined　by　using　the　T-spline　surface　characteristics　and　an　improved　offset　algorithm,　and　a　series　of　deformation　surfaces　was　obtained.　Finally,　the　feasibility　of　the　proposed　method　was　verified　by　using　finite　element　simulations　and　validated　by　experiment,　and　the　advantages　of　the　proposed　method　were　verified　by　comparison　with　the　existing　main　blade　processing　methods.