At present, the key chip for spacecraft localization is not high localization and heavily dependent on imports. Through analyzing the space environment and functional requirements of the chip , This paper designed SOC chip based on SPARC V8 ,which is used in satellite control system, first described the architecture and design process of SOC812A,Then validated its application in aerospace control actuator through current project. The application shows that SOC812A greatly improved the integration of electronic circuits and And actuator control accuracy had also been improved.