The　reverse　phase　winding　is　an　effective　method　to　suppress　the　common　mode　noise　of　the　PFC　circuit.　However,　to　obtain　the　best　effect,　it　is　necessary　to　quantitatively　analyze　the　parameters　of　the　reverse　phase　winding　and　draw　effective　conclusions,　especially　for　the　leakage　inductance　and　turn　ratio　of　the　reverse　phase　winding;　there　is　a　lack　of　in-depth　understanding　and　analysis　at　present.　In　this　paper,　the　high-frequency　equivalent　circuit　of　the　reverse　phase　winding　of　the　power　inductor　is　established,　and　the　mathematical　model　is　calculated.　This　paper　discusses　the　influence　trend　of　compensation　capacitance,　primary　and　secondary　side　leakage　inductance　and　the　number　of　turns　of　reverse　phase　winding　on　the　noise　suppression　effect,　and　gives　the　optimal　design　method　and　carries　out　experiments,　which　greatly　optimizes　the　common　mode　noise　of　PFC　circuit,　and　puts　forward　an　effective　theory.　©　2022　IEEE.