High-temperature-resistant piston ring

The invention relates to a high-temperature-resistant piston ring which comprises 80-200 parts of silicone rubber, 30-50 parts of polyorganometallosiloxane, 80-100 parts of alkoxy terminated polysiloxane, 1-5 parts of a cross-linking agent, 2-5 parts of fumed silica, 5-8 parts of a vulcanizer, 50-180 parts of fluoro rubber, 2-10 parts of nanometer zinc oxide, 2-10 parts of white carbon black, 15-50 parts of carbon black N300, 2-9 parts of ferric oxide, 4-15 parts of zinc borate, 2-12 parts of sulfur, 1-5 parts of an antiager, 3-10 parts of titanium dioxide, 1-6 parts of hydroxyl silicone oil, 1-6 parts of hydrogen silicone oil, 2-5 parts of magnesium hydroxide, 1-6 parts of dimethyl silicone oil, 2-5 parts of benzoyl peroxide, 2-8 parts of dichlorobenzoyl peroxide, and 3-8 parts of VTMS. Through the adoption of the high-temperature-resistant piston ring, the heat resistance of a piston can be effectively improved, and the service life of the piston is prolonged.