For the problems of impact collision and kinematic pair wear caused by the existence of clearance when the press was running, for the toggle press, based on the Recurdyn virtual simulation technology, by the L-N nonlinear spring damping model and the modified coulomb friction force, a clearance theoretical model was established, and the toggle press with clearance was simulated and analyzed. Then, the dynamic response of clearance size, crankshaft speed, restitution factor and double clearance to the mechanism was regearched, and according to the position change of mass center for rod to slow down the impact vibration. The results show that the larger the crankshaft speed and clearance, the larger the oscillation amplitude of the mechanism. The gradual increase of recovery factor also leads to a greater impact on the clearance of moving pair. In the case of double clearance, the closer to the power source, the greater the impact vibration. Adjusting the position of mass center for connecting rod can reduce the influence of unbalanced force caused by the structure of press itself.