Objective To study the dynamic characteristics of the support panel for corrugator under complex stress. Methods A model was built for the supporting panel for corrugators using Pro / E, modal analysis was conducted for the original structure and the optimized structure of the support panel using the finite element analysis, and the results of modal analysis before and after optimization were contrasted. Results The five-order natural frequencies and mode shapes were obtained for the original structure and the optimized structure of the panel. The analysis results revealed that the original structure of the panel suffered from torsional vibration, swing and bending deformation, while the optimized panel structure showed lower degree of deformation and increased stiffness, with about 25% increase in the natural frequency and about 83 kg loss in the weight. Conclusion The structural optimization of the panel was reasonable and reliable, which provides reference for structural optimization design.