Electrolytic capacitor with long service life

The utility model discloses an electrolytic capacitor with long service life, which comprises a capacitor main body, and a heat dissipation device is arranged on the outer layer of the capacitor mainbody; the heat dissipation device comprises a heat dissipation shell and a supporting rod. The radiating shell sleeves the outer side of the capacitor main body; one end of the supporting rod penetrates through and extends into the heat dissipation shell to be provided with a heat conduction block, and the other end of the supporting rod protrudes out of the outer surface of the heat dissipation shell to be provided with a pull ring. The heat conduction block abuts against the capacitor main body in the heat conduction block. A first groove is formed in the position, below the supporting rod,of the outer surface of the left side of the heat dissipation shell in a sunken mode, and an air supply fan is assembled in the first groove. And a second groove is formed in the position, right opposite to the air supply fan,