Aiming　at　the　problem　of　the　thermal　effect　of　the　high-speed　on-off　valve　was　unclear　about　its　structure　and　system　dynamic　characteristics,　a　multi-physics　coupling　model　was　established　to　analyze　the　relationship　between　the　valve　temperature,　structural　parameters　and　dynamic　response　The　results　show　that　if　the　minimum　clearance　between　the　spool　and　the　seat　is　less　than　12.8μm,　the　spool　will　be　stuck　before　the　coil　temperature　reaches　180°C.　For　the　dual-voltage　drive　control　strategy,　when　the　excitation　voltage　increases　from　12V　to　30V,　the　opening　time　decreases　by　48.23%,　the　closing　time　increases　by　18.74%,　the　thermal　power　increases　from　7.78W　to　104.35W,　and　the　coil　temperature　rises　from　46.4°C　to　290°C　in　5　min　of　operation.　When　the　temperature　increases　from　20°C　to　180°C,　its　maximum　electromagnetic　force　decreases　by　24.6%,　the　opening　action　time　is　prolonged　by　5%,　and　the　closing　delay　time　is　shortened　by　9.26%.　©　2022　IET　Conference　Proceedings.　All　rights　reserved.