Abstract:The process of the damping effect on the structure of tuned mass damper, in essence, is the process of transfer, conversion and dissipation of energy. Firstly, according to the the principle of the energy method, the energy balances of the TMD-structure system was analyzed in detail , and a deeply understand of the distribution , composition and the transfer mechanism of the energy of each part was made in the whole earthquake process; Then, based on shaking table test , the energy balance analysis of TMD-structure system was carried out, and the energy equilibrium theory of TMD-structure system was further verified experimentally, which established an experimental foundation for the next studying on the energy analysis of TMD-structure.