In this paper, the finite element analysis was established by ABAQUS to analyze the forming process of headless rivet pressed by 66° conical riveting die. Mechanical and metallographic analysis of the formed specimen were carried out, and the results were compared with those prepared by ordinary semi-circular head rivets. The results showed that during pressing deformation, the middle of the nail bar is thickened at the earliest forming the pier head, after which the nail bar is squeezed evenly with the hole wall gradually.With the increase of riveting displacement, the pull-out strength and shear strength of headless rivets elevate.Compared with the semi-circular head rivet formed by traditional flat riveting die, the metal material flows more evenly to the nail rod in conical riveting die, and the adiabatic shear effect on both sides of the pier head is significantly weakened.