With the development of 5G and 6G communications， satellite communication， which can provide the global seamless coverage capability， has become an indispensable and important role. In view of the open channel characteristics of satellite communication， the security of satellite communication has been paid more and more attention， especially the demand for satellite secure communication in national defense and military communication. Based on the architecture of the multi-satellite and terminal multi-antenna （MS-TMA） satellite communication system， from the physical layer of security and covert communication theory， a satellite covert communication strategy is put forward. Theoretical analysis and simulations validate the secure communication performance of the approach. The findings offer significant insights for advancing satellite secure communication theory and the practical applications.