Aiming at the pressure riveting problem of double-sided countersunk rivets of V-shaped structural composite materials common in aircraft,a variable thickness non-uniform universal pressure riveting system was proposed.The composite material assembly modeling of aircraft V-shaped structure was introduced,and the bevel riveting technology of double-sided countersunk titanium rivets was analyzed.On this basis,the variable thickness non-uniform universal pressure riveting system was designed,and the finite element simulation was carried out by using ANSYS software.Finally,relevant experiments were designed to verify.The results of the V-shaped test plate pressure riveting test show that no composite material delamination occurs after the system is used before and after pressure riveting.In the application of aircraft products,the pass rate of pressure riveting can reach more than 90%,the quality of pressure riveting is stable,the product surface quality is high,the operation is simple and convenient.