Abstract: The micro configuration of porous material can be represented by its density under standard manufacturing engineering. Based on this idea and using different densities to represent different micro configurations of the damping material, experiment studies on circular laminated damping structures are implemented and the influences of structure topology and material density on structural damping ratios are measured. The curves of the damping ratio of the structure with given optimized configuration versus different densities and load cases and that of the structure with a given density versus an optimization form and load cases are measured. The two-scale experimental results indicate that the suitable structure optimization and material design can improve the damping characteristics of circular laminated damping structures. At the same time, the research indicates that multiple local optimization forms of the damping layer come into being to satisfy the engineering specification.