［Objective］To address the increasingly severe heating problems of power equipmentduo to the long-term operation and the consequent threats to the safety and stability of power systems， new functional coating technologies that combine efficient heat dissipation with surface protection needto be developed urgently.［Methods］ A bionic superhydrophobic radiative cooling coating was proposed and fabricated. By introducing carbon nanotubes（CNTs）fillers with high thermal conductivity and high emissivity into the superhydrophobic coating system，a superhydrophobic heat-dissipationcoating with both excellent heat-dissipation performance and self-cleaning functionality was prepared， and the thermal physical properties，electrical insulation characteristics，and environmental stability of the coating were systematically studied.［Results］ The experimental results demonstrated that theoptimal performance was achieved when the CNT doping concentration was 5%. At this concentration， the thermal conductivity of the coating reached 2. 29 W/(m·K)，and the emissivity remained at approximately 95%. Under identical heating conditions，the coating significantly reduced the temperature of the transformer oil inside the metal can，verifying its superior heat dissipation capacity. Furthermore，the coating exhibited outstanding superhydrophobicity（with a water contact angle >150°，water rolling angle ≤2°， n-hexadecane rolling angle ≤8°），self-cleaning ability，adhesion，and weather resistance，as well as anti-fouling flashover performance，meeting the requirements for long-term stable operation of power equipment surfaces.［Conclusion］This study provides a new approach for the integrated design of surface protection， thermal management and electrical insulation performance for power equipment，which is of great significance for improving the safety and reliability of power grid operations.