In　this　paper,　method　for　modeling　and　measuring　oriented　silicon　steel　sheet　excited　by　pulse　width　modulation　(PWM)　signal　is　proposed　in　this　paper.　The　magnetic　property　test　platform　of　oriented　silicon　steel　sheet　excited　by　PWM　power　is　established.　According　to　the　experimental　data　of　magnetization　mechanism　and　magnetic　properties　of　silicon　steel　sheet,　combined　with　Preisach　model,　the　hysteresis　model　of　silicon　steel　sheet　under　PWM　excitation　is　established.　It　provides　an　accurate　material　parameter　model　for　calculating　the　magnetic　field　distribution　of　laminated　iron　core　of　product　grade　transformer.　©　2022　IEEE.