The invention discloses an alternating-current electromagnet with an energy storage circuit. The alternating-current electromagnet comprises a conventional alternating-current electromagnet composed of a movable iron core, a static iron core, a reset spring and an excitation coil and an electronic unit, and the electronic unit is composed of a DC power supply and keeping circuit, a control pulse generation circuit, a switching circuit, the energy storage circuit, an electric bridge circuit and a common port.