Low-voltage large-current connection switch

The utility model belongs to the technical field of switches, and discloses a low-voltage large-current connection switch, which comprises a switch shell, a conducting bar, a conducting plate and a power device, and is characterized in that the switch shell comprises a bottom box, the upper part of the bottom box is connected with an upper cover through a buckle, two sides of the bottom of the bottom box are provided with holes, the conducting bar extends outwards through the holes, and the upper part of the bottom box is opened; the inner surface of the bottom box on the two sides of the conducting bar is provided with fixing protruding blocks, the bottom of the upper cover is open, the center of the upper surface of the upper cover is provided with a power device fixing groove, a power device is arranged in the power device fixing groove, and the outer surface of the end, connected with the conducting plate, of a push rod of the power device is provided with threads. A groove is formed in the center of the