Boost power factor correction (PFC) converters are widely used in various switching power supply to improve the utilization of power. In order to further optimize the performance of Boost PFC converters, duty cycle feedforward control is added on the basis of average current control mode. Firstly, the working principle of Boost PFC converter and the control principle of average current control mode are introduced. Then the calculation of inductance and output capacitance is analyzed. Then the circuit model with duty cycle feedforward control is built in MATLAB/SIMULINK and the simulation experiment is carried out. Finally, the simulation results are analyzed. The results show that the power factor of the system is improved by adding duty ratio feedforward control, which reduces the total harmonic distortion rate of the input current to a certain extent, and which increases the stability of the system.