A　full-range　line-field　Fourier-domain　optical　coherence　tomography　(LF-FDOCT)　system　with　an　accuracy　at　nanoscale　was　proposed　for　high-accuracy　measurements　of　optical　lens　surface　profile.　The　LF　surface　curve　information　of　optical　lens　could　be　obtained　in　one　measurement　which　does　not　need　point-by-point　scanning　used　in　the　traditional　1-D　FDOCT　system.　The　measurement　accuracy　of　surface　profile　curve　could　be　improved　from　micrometer　scale　to　nanoscale　by　applying　spectral　center　correction　method　(SCCM)　to　the　complex　spectral　interferogram.　The　corrected　five　phase-shifting　(CFPS)　method　was　employed　to　eliminate　the　complex-conjugate　artifacts　and　the　polychromatic　error.　The　numerical　simulation　and　experiment　results　demonstrated　that　the　CFPS　method　had　a　better　complex-conjugate　suppression　performance　than　other　phase-shifting　methods.　Optical　lens　(e.g.,　cylindrical　lens　and　spherical　lens)　was　measured　by　the　homemade　LF-FDOCT　system.　After　the　analysis　of　the　surface　profile,　the　radius　and　the　optical　focal　length　of　the　measured　lens　were　precisely　obtained　in　a　noncontact　and　nondestructive　way.　Therefore,　the　developed　LF-FDOCT　system　has　provided　a　new　tool　for　high-accuracy　measurements　of　optical　lens　surface　profile　and　its　parameters.