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With the development of the aerospace industry, the scale of the new generation spacecraft increases rapidly as well as the electronic devices. Accordingly, the requirements for power distribution become more complex, and so power supply and distribution system has changed from the traditional way to intelligent direction. Besides, intelligent and integrated design is required in order to improve the carrying capacity. The traditional distribution system using relays can no longer meet the needs in terms of intelligence and reliability. Power distribution technology using solid state power controller (SSPC) is the current development trend. This paper introduces the application of solid state power controller in the spacecraft. The high reliable and intelligent power supply and distribution system using SSPC technology is proposed to satisfy the complex requirements for spacecraft. Key design issues including distribution of big current, switch control of load, built in test, and over-current protection are put forward and solved. The results show that it’s a successful engineering experience for the application of SSPC in future spacecraft.