The stamping curve characteristics of press is the core factor that affects the quality of the finished stampings. As the traditional design method for stamping curve is limited to a rigid system, which ignoring the elasticity of the system, there is a deviation with the actual situation. Firstly, the mechanical characteristics of the motor and the elasticity of its components were taken into consideration, so the dynamics model of press system was established. Then the nonlinear dynamics differential equation was solved by fourthorder RungeKutta method, and the slider curve model of stamping was obtained. Finally, a numerical example was introduced and the differences between the obtained model and the conventional design were compared. The results show that the system inertia and elastic deformation have a great impact on the nominal pressure zone of stamping curve.