Abstract: After using ⁶⁰Co γ-ray to irradiate vulcanization silicon rubber autohesive tape, the effect of absorbed dose to the autohesive tape’s tensile strength, elongation at break, autohesin and breakdown voltage strength and dose rate’s effect to the autohesive tape’s properties were studied. The results indicate that autohesive tape’s tensile strength increases and the elongation at break decreases with the increasing dose. Under the dose of 25 kGy, the tape’s autohesin increases with the increasing dose. When the dose is up to 25 kGy, the tape’s autohesin achieves to the maximum, and then decreases with the increasing dose. Absorbed dose has no effect to the tape’s breakdown voltage strength, and the dose rate has no effect to the autohesive tape’s properties.