<p>In this paper, the effects of step deviation and squeeze force on the mechanical properties of riveted joints are investigated experimentally. First, the rivets were removed from the specimens using wire cutting, and the interference fit sizes were obtained. Then, metallographic specimens were carried out to obtain the interface contact state. Next, the shear and pull-out properties were researched. Finally, the fatigue performance of riveted joints co-influenced by step deviation and squeeze force was investigated by fatigue tests. It was discovered that the direction and the size of step deviation had a significant effect on the distribution of interference, the size of interference fit, and the interface contact state. The step deviation and squeeze force have little effect on the shear load and pull-out load but have a significant effect on the fatigue life. The presence of step deviation diminishes the effectiveness of achieving fatigue life gain by increasing squeeze force. This study may provide methodological guidance for the optimization of drilling and riveting processes as well as for the innovation of standards.</p>