Disclosed is an anti-surge bridgeless power factor correction (PFC) circuit, which comprises a bridgeless PFC circuit and a boost capacitor which are connected between an AC power supply and a load in sequence. The anti-surge bridgeless PFC circuit also comprises a protection unit, a switch unit and a control unit. When a surge merges into the input of the AC power supply, the control unit controls the switch unit to be conducted, so as to form return current and discharge surge energy through the protection unit, the boost capacitor and the switch unit, thereby being able to protect a bridgeless PFC circuit from the influence of the surge.