With　the　non-dispersion　characteristics,　the　lowest　shear　horizontal　mode　SH0　can　be　widely　applied　in　the　detection　and　monitoring　of　a　defect　in　plate　structures.　In　order　to　achieve　SH0　mode　excitation　in　aluminum　plates,　based　on　Lorentz　force　mechanism,　a　new　directional　SH0　mode　EMAT　based　on　periodic　grating　coil　(PGC),　called　PGC-EMAT,　is　designed　in　the　study.　On　the　surface　of　the　aluminum　plate,　the　PGC　produces　the　horizontal　eddy　current.　The　oppositely　induced　eddy　currents　are　generated　by　the　adjacent　grating　units.　The　current　I　of　the　multiple　wires　in　each　grating　unit　is　the　same.　The　rectangular　magnet　provides　the　static　magnetic　field　perpendicular　to　the　surface　of　the　aluminum　plate.　In　addition,　the　PGC-EMAT　with　different　grating　units　of　the　periodic　grating　coil　and　coil　layers　are　simulated　by　three-dimensional　finite　element　simulation.　The　simulation　results　show　that　with　the　increase　of　grating　units　of　the　periodic　grating　coil,　the　tangential　displacement　of　PGC-EMAT　will　increase,　and　the　tangential　displacement　of　double-layer　periodic　grating　coil　is　larger　than　that　of　single-layer　periodic　grating　coil　when　the　number　of　grating　units　of　the　periodic　grating　coil　is　the　same.　The　developed　EMAT　can　excite　and　receive　a　single　SH0　mode　and　the　actual　center　frequency　of　the　transducer　coincides　with　the　theoretical　value.　It　was　proved　that　the　central　frequency　of　the　transducer　was　controlled　by　the　distance　between　the　adjacent　grating　units　of　the　periodic　grating　coil.　In　order　to　increase　the　energy　of　the　signals　excited　or　received　by　PGC-EMAT,　the　number　of　cycles　of　grating　units　and　the　number　of　layers　of　the　transducer　were　studied.　The　experimental　results　showed　that　there　was　a　linear　relationship　between　the　number　of　cycles　of　the　grating　units　and　the　energy　of　the　excited　and　received　signals.　The　energy　of　the　excited　and　received　signals　of　the　double-layer　PGC-EMAT　was　larger　than　that　of　the　single-layer　PGC-EMAT　when　PGC-EMAT　was　used　as　excitation　transducer　or　receiving　transducer.　The　simulation　results　were　experimentally　verified.　The　developed　PGC-EMAT　can　be　applied　in　defect　detection.