A　precision　compensation　method　for　large　scale　of　absolute　distance　measurement　with　range　amplification　technology　by　optical　fiber　pairs　is　proposed,　which　can　be　used　to　maintain　measurement　accuracy　for　laser　frequency　sweeping　interferometry　(FSI)　system　with　object　distance＇s　accretion.　A　range　amplified　absolute　distance　measurement　system　with　laser　frequency　sweeping　interferometry　is　established　by　a　variable　and　incremental　reference　path,　the　optical　path　difference　of　the　range　amplified　part　is　self-calibrated　in　FSI　measuring　way.　The　origin　of　the　system　is　self-calibrated　and　the　reference　path　is　switched　after　rough　measurement,　then　the　measuring　result　is　achieved　after　fine　measurement.　The　range　amplified　system　with　optical　fiber　pairs　has　a　higher　absolute　distance　repeatability　precision　when　the　object　distance　gets　larger　than　3000　mm.　The　repeatability　precision　of　the　range　amplified　system　is　increased　by　2.4　μm　compared　with　FSI　system　for　absolute　distance　of　6700　mm.