To　comprehensively　quantitative　assessment　of　delamination　location　in　CFRP　composite　plates,　a　Lamb　wave　spatial　frequency　wavenumber　imaging　method　based　on　laser　ultrasonic　full-wavefield　scanning　inspection　is　proposed　in　this　paper.　For　a　CFRP　composite　plate　specimen　containing　a　delamination,　a　piezoelectric　sensor　is　arranged　to　excite　a　sinusoidal　modulation　tone-burst　signal.　A　laser　transducer　is　used　for　pointwise　reception　to　obtain　Lamb　waves　full-wavefield　data.　Frequency　domain　filtering　were　performed　on　the　wavefield　signal　to　obtain　single-mode　wavefield.　Short-space　Fourier　transform　and　instantaneous　wavenumber　analysis　were　applied　to　single-mode　wavefield　signal　to　obtain　a　distribution　image　of　Lamb　wave　spatial　wavenumber　respectively.　At　the　same　time,　the　Lamb　wave　dispersion　relation　in　CFRP　composite　plate　is　analyzed,　and　the　delamination　location　is　calculated　based　on　this　relationship.　Finally,　it　can　be　seen　from　the　imaging　results　that　instantaneous　wavenumber　analysis　can　accurately　locate　the　distance　between　the　delamination　and　the　laser　scanning　detection　surface,　but　the　short-space　Fourier　transform　technology　cannot　identify　the　location　of　defects　under　the　experimental　parameters　set　in　this　paper.　Copyright　©　2022　by　ASME.