Abstract: Aiming at the key tasks of deep space exploration such as lunar exploration, small celestial exploration, Mars exploration, Jupiter and interplanetary exploration in China, the specific requirements of the power system are proposed based on the analysis of the characteristics of individual detection missions. Finally, the power system requirements of all deep space exploration missions are summarized. the main development requirements of power system for deep space exploration missions in China are proposed, including wide temperature anti-irradiation solar array, light and small intelligent power control device, high power density power system topology, high efficiency and high reliability thermoelectric conversion technology, providing reference for the research and design of deep space exploration power system.