Electrolytic capacitor resistant to ultra-high temperature and ultra-low temperature

The electrolytic capacitor comprises an aluminum shell, one end of the aluminum shell is fixedly connected with a sealing cover, one side of the sealing cover is fixedly connected with an insulating plate, the side, away from the sealing cover, of the insulating plate is fixedly connected with a capacitor part, the end, away from the insulating plate, of the capacitor part is fixedly connected with a heat conduction plate, and the capacitor part is sleeved with a semiconductor chilling plate. A barrel is sleeved outside the semiconductor chilling plate, the barrel is fixedly sleeved in the aluminum shell, one end of the barrel is fixedly connected with the aluminum shell, and the other end of the barrel is fixedly connected with a filter screen. In a high-temperature or low-temperature environment, the capacitor is cooled or heated through the semiconductor chilling plate, so that the high-temperature resistance and low-temperature resistance of the capacitor are improved, and the capacitor is prevented from