Abstract: In order to accurately predict the shock response spectrum through the numerical simulation method, in this paper, based on the modal testing and the shock response spectrum testing, the dynamic parameters during the impact process of the response plate are modified. During the modal testing, the response surface optimization method is used to optimize the elastic modulus, the Poisson’s ratio, and the thickness of the response plate. The relative errors of the optimized natural frequency are better than 2%. During the shock response testing, when the punch height is 6.3 cm, the response spectrum curves obtained by the testing and by the numerical simulation are used to evaluate the relative error. To minimize the root mean square error of the shock response spectrum at the analysis frequency points, the best fitted mass damping coefficient and the stiffness damping coefficient are obtained after the curled surface fitting. With the simulation model and the modified dynamic parameters, the error of the response spectrum prediction is within ±6 dB for three different punch heights, which shows that the dynamic parameter optimization method is applicable.