Abstract: To address the drawbacks of traditional voltage-current dual closed-loop control, such as complex parameter tuning and slow response, this paper proposes a bridge-less Boost PFC control strategy based on input-output linearization. A single-input single-output affine nonlinear system model of the bridge-less Boost PFC is constructed, and the controller is designed according to linear control system theory. Simulation results show that when the load is constant, the input current can follow the phase variation of the input voltage and maintain a sinusoidal waveform; when the load changes abruptly, the input current changes rapidly, the output voltage ripple varies slightly, but the average voltage remains constant. This proves the fast response and robustness of the control strategy.