Control method of power factor correction circuit

The invention provides a control method of a power factor correction circuit. The control method comprises the following steps: outputting a first synchronizing signal to a second controller through a first controller; the second controller adjusts the second PWM signal group based on the first synchronization signal to obtain a new second PWM signal group, so that the new second PWM signal group and the first PWM signal group are staggered by a preset angle in phase; and outputting a first PWM signal group through the first controller to drive the first power factor correction module, and outputting a new second PWM signal group through the second controller to drive the second power factor correction module. According to the control method of the power factor correction circuit provided by the invention, RCD misoperation can be avoided, and normal work of a system can be ensured.