Multi-plate connecting rivet

The multi-plate connecting rivet comprises a first riveting body, the first riveting body comprises a first riveting cap, a first riveting pipe and a rivet core, one end of the first riveting pipe is fixedly connected with the first riveting cap, the rivet core is arranged in the first riveting pipe in an inserted mode, and a large rivet head and a small rivet head are arranged on the rivet core in the length direction of the rivet core; the large rivet head protrudes out of the end, away from the first rivet cap, of the first rivet tube, the large rivet head and the first rivet tube are in abutting fit, the small rivet head is located in the first rivet tube, and the diameter of the side, close to the first rivet cap, of the small rivet head is smaller than that of the side, away from the first rivet cap, of the small rivet head. The first rivet tube is sequentially deformed at two positions, the first plate and the second plate are riveted and fixed, the third plate and the second plate are riveted and fixe