The invention provides a power conversion device, which receives AC provided by an AC power supply and carries out conversion. The power conversion device comprises a power conversion circuit and a surge energy suppression circuit, wherein the power conversion circuit comprises a bridge switch unit and a bus capacitor, the bridge switch unit comprises two DC ends electrically connected with two ends of the bus capacitor respectively, and the power conversion circuit uses the bridge switch unit for electric energy conversion and uses the bus capacitor for voltage stabilization; and the surge energy suppression circuit comprises a rectifying circuit and an inductive reactance coupled magnetic component, the inductive reactance coupled magnetic component is serially connected with the rectifying circuit, a multi-terminal network is formed with the rectifying circuit, the multi-terminal network comprises multiple AC ends and two DC ends, the multiple AC ends are electrically connected withan AC power supply, and the bridge switch unit and the bus capacitor are electrically connected with the two DC ends in a parallel mode.