In practice, the deformation of the parts of engine valve rocker pressure riveting machine may influence the riveting accuracy and the analysis with multirigid body model cannot meet the accuracy requirements. Therefore, ANSYS and ADAMS were used to build a rigidflexible coupling model based on virtual prototyping technology and dynamic simulation was made. In order to solve the problem that it was difficult to simulate a system included plastically deformed objects, DEFORM3D was used to analyze the deformation of rivet in the riveting process and the “die loadcompressed length of rivet”curve was gotten as the stiffness of a nonlinear spring to replace the rivet in ADAMS.This method makes the simulation close to actual situation and makes the results have guidance for control.