This paper, the hardness of the silicone rubber wire for 50, 60 degrees, 70 degrees High Temperature Vulcanizing (HTV) method using specimens were fabricated. In this paper, in order to investigate the dielectric properties of silicone rubber for wire specimens, the temperature range of 30℃~170℃, the frequency range from 100Hz~4.5MHz report surveyed about the frequency and temperature dependent properties.