Based　on　low-coherence　light　interference　principle,　a　two-dimensional　Fourier　domain　optical　coherence　vibration　tomography　(2D-OCVT)　system　is　developed,　in　which　a　high　speed　CMOS　camera　is　employed　as　the　detector.　By　analyzing　the　interference　signal　caused　by　the　interference　of　reflected　light　from　vibration　structure　surface　and　the　reference　light,　the　displacement　of　the　vibrating　structure　can　be　obtained.　Nano-scale　ultra-high　resolution　can　be　achieved　after　using　discrete　spectrum　correction　method.　2D-OCVT　system　can　be　used　to　measure　line　field　vibrations,　that　is,　multipoint　displacement　information　can　be　measured　simultaneously　at　one　data　acquisition.　Therefore,　it　can　take　advantage　of　output-only　model　analysis　without　knowing　the　input　force　information　for　real-time　structural　modal　analysis.　It　also　does　not　need　to　move　sensors　along　the　measured　structure　to　get　multipoint　displacement　information.　Experimental　results　show　that　the　2D-OCVT　can　precisely　measure　0-1000　Hz　vibration　signal.　The　system　can　meet　the　need　of　high-　and　low-　frequency　measurement,　providing　a　new　tool　for　the　engineering　structure　vibration　modal　analysis.　©　2020,　Nanjing　Univ.　of　Aeronautics　an　Astronautics.　All　right　reserved.