Lamb　waves　have　the　characteristics　of　long　propagation　distance,　and　they　can　be　used　to　realize　rapid　and　wide-scale　nondestructive　testing　of　plates.　The　detection　sensitivity　can　be　improved　by　using　a　high-order　Lamb　wave　mode　with　a　short　wavelength.　However,　Lamb　waves　have　multimode　characteristics.　The　number　of　Lamb　wave　modes　greatly　increases　at　high　frequencies,　and　it　is　difficult　to　obtain　a　pure　single　high-order　Lamb　wave　mode　with　electromagnetic　acoustic　transducers　(EMATs);　this　increases　the　difficulty　of　signal　processing　and　analysis.　In　this　study,　an　obliquely　incident　EMAT　based　on　the　inclined　static　magnetic　field　was　designed　to　solve　this　problem.　The　mode　selectivity　of　the　proposed　obliquely　incident　EMAT　is　superior　to　that　of　the　traditional　EMAT.　A　new　parameter　is　proposed　to　improve　the　mode　selectivity　of　EMATs:　the　polarization　angle　of　the　permanent　magnet.　The　incident　angle　of　incident　ultrasonic　waves　is　controlled　by　selecting　the　polarization　angle　of　permanent　magnet.　A　rectangular　permanent　magnet　is　obliquely　polarized　to　provide　a　biased　inclined　static　magnetic　field.　The　obliquely　incident　Lorentz　force　is　formed　through　the　coupling　between　the　eddy　current　and　the　inclined　static　magnetic　field　by　an　obliquely　polarized　permanent　magnet.　The　obliquely　incident　Lorentz　force　is　the　source　of　the　obliquely　incident　ultrasonic　wave.　Simulation　and　experimental　results　show　that　the　developed　obliquely　incident　EMAT　can　reduce　the　amplitude　of　the　unwanted　modes　and　enhance　the　mode　selectivity.　It　was　also　verified　that　the　developed　obliquely　incident　EMAT　had　better　frequency-response　characteristics　and　sound-field　directivity.