From the results of heat resistance and antioxidant performances in practical applications of silicone rubber, the effects of three new types of materials e.g.ASG-1 phenyl methyl silicone oil, 109 dimethyl diphenyl RTV neat silicone rubber ,801CT silicone heat-resistant synergistic additive on improving heat resistance and antioxidant performances of silicone rubber are described.Five years of practical applications it is revealed that above-mentioned materials have remarkably positive effects.Especially 801CT silicone heat-resistant synergistic additive be up to international advanced level.