A switch bleeder circuit and a control method. The switch bleeder circuit comprises a first controller, a driver and a freewheeling circuit, wherein the freewheeling circuit comprises a choke inductor, a load and a freewheeling diode; the first controller controls the driver; an output end of the choke inductor is connected to an input end of the load; an output end of the load is connected to an input end of the freewheeling diode; an output end of the freewheeling diode is connected to an input end of the choke inductor; a current input end is provided between the choke inductor and the freewheeling diode; and a current output end is provided between the load and the freewheeling diode; and a bleeder switch is connected in parallel between two ends of the load, and the first controller is connected to the bleeder switch via a second controller. The control method achieves the purpose of whether to short-circuit a load by controlling the on/off of a bleeder switch, thereby realizing current bleeding. By mean
