This paper studied the influence of electron beam irradiation on the properties of silicone rubber, including its mechanical performance, hydrophobicity and material characteristics. The results of different dose were compared. As the electron beam irradiation dose increased, the elongation at break decreased continuously while the tensile strength initially decreased and then increased at higher dose. All samples kept high hydrophobicity before and after irradiation. The XPS results showed that during the irradiation, the Si and C concentration tend to decrease while the O concentration stayed stable. The FTIR result showed that the functional group of silicone rubber main chain first be disrupted and then reformed with the dose rising. This paper helps understand the effect of high energy electron beam on the silicone rubber for insulating material and explore future possibilities for silicone rubber vulcanization techniques.