Electromagnetic　acoustic　transducers　(EMATs)　have　been　widely　applied　in　nondestructive　testings　and　structural　health　monitoring.　This　paper　proposes　a　flexible　surface　wave　electromagnetic　acoustic　transducer　(FSW-EMAT),　which　uses　flexible　rubber　magnets　instead　of　hard　permanent　magnets,　in　order　to　achieve　the　defects　detection　of　steel　pipe　or　other　ferromagnetic　structures　with　a　certain　surface　curvature.　Traditional　EMATs　mainly　consist　of　three　parts:　magnet,　coil　and　metal　specimen　to　be　tested.　Permanent　magnets　or　electromagnets　are　generally　used　to　produce　the　strong　magnetic　flux　density.　However,　the　two　kinds　of　magnets　are　not　suitable　for　the　defect　detection　of　metal　specimens　with　a　certain　curvature.　The　proposed　FSW-EMAT　in　this　paper　adopts　a　flexible　magnet,　which　is　a　mixture　of　rubber　and　iron　powder　and　has　strong　flexibility　to　fit　the　bent　specimen.　The　proposed　FSW-EMAT　can　be　easily　applied　in　the　testing　of　curved　structural　component　and　detect　axial　and　circumferential　defects　by　rotating　the　transducer.