In　order　to　further　improve　the　work　efficiency　of　exciting　source　for　electromagnetic　ultrasonic　phased　array,　a　method　of　gate　drive　circuit　design　of　high　frequency　isolation　for　exciting　source　of　electromagnetic　ultrasonic　phased　array　was　presented　in　this　paper　based　on　half　bridge　topology　structure.　Through　analyzing　the　process　of　turn-on　and　turn-off　loss　of　MOSFET　based　on　the　simplified　model　structure　of　MOSFET,　satisfied　conditions　of　drive　circuit　with　high　frequency　isolation　were　put　forward　and　the　reference　potential　was　converted　by　using　fiber　optic　components　isolated　pulse　signal　and　DC-DC　power　supply.　The　high　frequency　“floating　gate”　problem　of　drive　circuit　was　solved　effectively,　and　the　dead-time　adjustable　circuit　was　designed　by　combining　the　RC　differential　circuit　with　Schmitt　inverter.　The　experimental　results　show　that　the　design　of　drive　circuit　can　output　drive　signal　in　which　the　frequency　is　1.1　MHz,　the　dead-time　is　0.32　μs,　the　voltage　amplitude　is　18.8　V,　and　the　duty　ratio　is　26%.　The　drive　circuit　reduces　power　loss　of　power　switch　tube　effectively　in　the　practical　application　of　driving　MOSFET.　©　2017,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.