Far-field　laser　technology　has　greatly　promoted　the　progress　of　nondestructive　ultrasonic　imaging　of　bulk　structures.　However,　under　thermoelastic　excitation,　the　body　waves　exhibit　a　relatively　low　signal-to-noise　ratio,　resulting　in　images　with　low　resolution　and　contrast.　Based　on　the　motivation,　this　paper　developed　a　frequency-domain　phase　weighted　imaging　method　to　improve　the　quality　of　laser　ultrasonic　defect　imaging.　Firstly,　laser　ultrasonic　scanning　was　performed　on　the　sample　with　artificial　transverse　hole　defects.　The　cylindrical　lens　focused　line　source　was　used　to　improve　the　intensity　of　the　body　wave　signals,　and　ensure　that　there　was　no　damage　on　the　material　surface　under　high　laser　energies.　Then,　the　frequency-domain　phase　shift　migration　(PSM)　algorithm　was　used　to　perform　multimode　imaging　of　defects,　achieving　frequency-domain　synthetic　aperture　focusing　technique　(F-SAFT)　and　total　focused　method　(F-TFM)　imaging　based　on　full　matrix　capture.　Furthermore,　the　phase　circular　statistical　vector　(PCSV)　was　proposed　for　weighted　optimization,　which　improved　the　image　quality,　suppressed　the　background　noise　and　multimode　artifacts.　Finally,　the　imaging　quality　of　several　algorithms　were　discussed.　The　results　indicate　that　frequency-domain　images　were　superior　to　time-domain　results.　After　phase　weighting,　the　imaging　quality　can　be　further　improved,　and　the　detection　blind　zone　was　significantly　reduced.　This　work　will　contribute　to　the　rapid　and　high-quality　defect　imaging　of　laser　ultrasonic.