Abstract: To reduce the design cycle and the cost caused by repeated changes in the process of improving design, the 3D modeling of the plunger ring die forming device was conducted through SOLIDWORKS and was simulated dynamically based on ADAMS. At the same time, the 3D modeling also pictured relative trajectory of the key points on the plunger-die hole. By analyzing the meshing process of plunger and die hole through this method, the fact was proved that the plunger will not interfere with the die hole. Meanwhile, the range of plunger space was given, in which the interference will be avoided, which made this construction design much reasonable and practical.