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.