Dual-elbow-bar mechanism parametric model of the die-cutting machine was established using MSC. ADAMS. By establishing the optimizing objective function of dual-elbow-bar mechanism, parametric optimization analysis of the structural dimensions of dual-elbow-bar mechanism was achieved. Related kinematics and dynamics simulation was carried out by using ADAMS. The optimization results showed that reducing the angle of the moving platform and the horizontal plane, and the horizontal displacement will greatly improve the cutting speed, accuracy and stability of the whole machine.