Most existed intelligent adjustment mechanism methods for communication system of spacecraft are limited to physical layer design at present, making it difficult to adapt to special conditions. The intelligent adjustment mechanism method of Communication system for most spacecraft is limited to the physical layer design at present, making it difficult to adapt to special conditions. for Communication system, a layered intelligent adjustment mechanism method is proposed, which is designed by the physical layer, data The physical layer is designed separately from watchdog and read back reconfiguration, and the data link layer has completed the independent detection design based on the data link layer. The physical layer is designed separately from watchdog and read back reconfiguration, and the data link layer has completed the independent detection design based on the RF link. The application layer has completed the design of automatic power control strategies for transmitters. The verification is carried out in ground experiment as well as in-orbit flight, and the result shows that the mechanism proposed is suitable for long-term flight.