The　increasing　demand　for　lightweight　materials　has　made　adhesive　bonding　a　primary　method　for　connecting　CFRP.　Enhancing　the　surface　quality　of　adhesive　joints　is　crucial　for　achieving　higher　adhesive　performance.　Femtosecond　laser　treatment　is　recognized　for　its　unique　advantages　in　CFRP　surface　treatment　but　often　faces　challenges　with　spot　size　and　surface　quality.　This　study　proposes　an　efficient　method　for　preparing　high-adhesive　CFRP　surfaces　using　a　femtosecond　laser　assisted　by　nitric　acid　and　ultrasonic　treatment.　By　optimizing　the　laser　and　nitric　acid-ultrasonic　treatment　parameters,　a　high-quality　surface　suitable　for　strong　adhesive　joints　is　achieved.　The　results　indicate　that　this　approach　enhances　the　tensile　shear　strength　of　bonded　CFRP　by　approximately　48.0　%.　Remarkably,　the　laser　pretreatment　for　a　12.5　mm　×　25.0　mm　area　can　be　completed　in　just　150　s,　increasing　laser　processing　efficiency　by　a　factor　of　approximately　226.　The　reasons　for　this　enhanced　performances　are　closely　related　to　the　synergetic　effects　of　surface　prepared　method,　which　increases　roughness　(48.3　nm),　surface　free　energy　(74.8　mJ/m2),　and　the　O/C　ratio　(33.3　%)　with　more　oxygen-containing　functional　groups.　This　research　provides　valuable　technical　and　theoretical　guidance　for　the　preparation　of　high-bond　strength　CFRP　joints.　©　2024　Elsevier　Ltd