Metal rubber with different densities (2.000, 2.286, 2.571 g·cm-3) was prepared with 304 austenitic stainless steel wires, and then assembled into a damping structure coated with metal rubber. Effects of environmental temperature (25,100,200,300℃) on energy dissipation characteristics and metal rubber density, loading amplitude (0.2, 0.5, 0.8, 1.0 mm) and frequency (1, 2, 3, 4, 5 Hz) on the high temperature (300℃) energy dissipation characteristics of the damping structure were studied. The results show that the energy dissipation, maximum elastic potential energy and loss factor of the metal rubber (with density of 2.286 g·cm-3) coated damping structure at 100-300℃ were slightly lower than those at 25℃, but the difference was relatively small, indicating that the metal rubber had excellent and stable damping properties at high temperatures. At 300℃, with increasing amplitude, the energy dissipation and maximum elastic potential energy of the metal rubber (with density of 2.286 g·cm-3) coated damping structure increased and the loss factor decreased. The frequency had little effect on the high temperature energy dissipation characteristics. With increasing density of metal rubber, the energy dissipation and maximum elastic potential energy at 300℃ increased, and the loss factor showed a fluctuant change.