The static characteristics analysis and modal analysis for the large static rotary workbench were carried out, and the bearing capacity and dynamic performance were obtained, which provided a theoretical basis for the optimization of the workbench.Based on the static and dynamic performance of the work workbench, in order to reduce its quality, meta structure method was used to optimize the design of sand hole structure. The optimized structure meets the need of the work to the dynamic and static stiffness, which guarantees the maximum first-order natural frequency.The experimental modal analysis was carried out for the optimized workbench. The experimental results and the simulation results were compared and analyzed. The results show that the error is within the allowable range, which ensures the dynamic characteristics requirement of the optimized workbench.