The invention discloses a connection method for a super-capacitor current collector and a metal housing, and a device therefor. The method is characterized in that 1), a current collector of the supercapacitor is welded with the metal housing through vacuum electron beam welding; 2) the current collector is provided with an arc-shaped outer edge, thereby guaranteeing the close fit of the metal housing with the current collector, and carrying out the circumferential continuous penetration melting welding in a vacuum environment through the vacuum electron beam welding technology. The method solves problems of liquid leakage, loosened welding, loosening easiness, big internal resistance, high self-discharge, and severe scraping because of a connection mode of a current collector and the metal housing in a current industry, and effectively reduces the production cost. The method and device are simple in technology, are reliable in connection, are easy to assemble, are good in sealing effect, and are novel.