Super capacitor is a new type of green energy storage device with high power density, long cycle life, fast charge and discharge speed, high reliability, green and environmental protection, etc. It has great application potential in aerospace and other fields. Electrode materials and electrolytes are the key to super capacitors, which determine the main performance indicators of the energy storage device. In the study of various performance parameter indicators of super capacitors, equivalent series internal resistance and capacitance are very important indicators to determine whether the super capacitor can work normally. In the national key R&D plan “Radiation-resistant Sic-based power electronic devices and their applications in aerospace power supply” project, the energy storage unit of the aerospace power supply adopts a super capacitor module. In order to explore the impact of space radiation on the super capacitor energy storage unit, an irradiation test was designed. The Co60γ radiation source was used to conduct different irradiation tests on the randomly selected super capacitors of the same batch. The capacitance and internal resistance of the super capacitor were tested before and after the test, and then the data were analyzed. The results show that after the irradiation test, the capacitance and resistance of the super capacitor changed, but they were still within the requirements of the specification and met the requirements of the energy storage unit.