In　the　traditional　electromagnetic　acoustic　transducer　(EMAT)　based　on　Lorentz　force　mechanism,　to　meet　the　principle　of　constructive　interference,　the　coil　center　distance　is　generally　set　to　be　half　of　the　wavelength　of　the　specified　mode.　The　fixed　center-to-center　coil　produces　a　Lorentz　force　under　the　action　of　a　uniform　static　magnetic　field　provided　by　the　magnet,　thereby　producing　a　specified　mode　signal　that　satisfies　the　constructive　interference.　In　the　above　principle,　the　center　distance　of　the　coil　is　fixed,　and　applied　with　a　uniform　static　magnetic　field,　which　the　coils　with　different　center　distances　are　combined　with　the　dispersion　curve　to　control　the　mode　of　the　generated　signal;　that　is,　tuning　the　signal　mode　by　changing　the　center　distance　of　the　coil.　Another　way　to　tune　the　signal　mode　is　by　changing　the　configuration　of　the　magnet.　Adopting　appropriate　waves　for　the　identification　of　individual　types　of　defects　facilitates　faster　and　more　accurate　detection.　When　using　EMAT,　some　specifications　of　EMAT　need　to　be　changed,　which　can　be　inefficient　and　costly.　To　solve　the　problem,　a　mode-tuning　magnetic-concentrator-type　electromagnetic　acoustic　transducer　(MT-MC-EMAT)　is　proposed　in　this　study.　This　type　of　EMAT　controls　the　mode　of　the　generated　signal　by　controlling　the　center　distance　of　the　static　magnetic　field　provided　by　the　magnet;　that　is,　designing　a　new　type　of　double-layer　variable-pitch　meander　coil　and　different　magnetic　concentrators　to　select　each　coil.　This　method　can　tune　the　mode　of　the　excitation　signal　by　replacing　the　magnetic　concentrator　without　changing　a　series　of　parameters,　such　as　the　coil,　magnet,　and　excitation　frequency.　Different　types　of　magnetic　concentrators　were　added　to　a　traditional　EMAT　to　guide　and　concentrate　the　magnetic　field　of　the　permanent　magnet,　thereby　changing　the　distribution　of　the　magnetic　flux　density.　These　magnetic　concentrators　corresponded　to　meander　coils　with　different　pitches　to　satisfy　constructive　interference　and　achieve　signal　mode　tuning.　Both　finite　element　simulation　and　experiment　proved　that　the　mode　generated　by　this　transducer　was　tunable　after　adding　the　different　types　of　magnetic　concentrators.　Furthermore,　experiments　were　conducted　to　examine　the　transducer　characteristics.　Finally,　the　configuration　of　the　MT-MC-MAT　was　optimized　through　orthogonal　experiments.　The　influence　of　each　parameter　on　the　transducer　efficiency　of　the　proposed　MT-MC-EMAT　was　studied,　and　the　optimal　parameter　combination　was　confirmed.