This　paper　present　on　an　new　error　identification　approach　on　B　rotary　axe　geometric　error　for　a　non-orthogonal　five-axe　CNC　machine　tool　research　is　not　enough　in　the　domestic　and　abroad,　establish　the　motion　error　model　of　non-orthogonal　five-axe　CNC　machine　tool　based　on　the　multi-body　system　theory　(MBS),　there　are　total　12　static　errors　and　dynamic　errors　in　this　model.　Design　eight　different　measurement　method　to　measure　12　errors.　Finally　realizing　12　errors　identification　of　the　B　rotary　axe　by　combine　measurement　results.　This　approach　can　be　used　for　the　rotary　axe　error　identification　of　five-axe　CNC　machine　tool　and　the　measurement　results　are　accurate　after　test　verification.　©　2017　IEEE.