For the InterSatellite TC&R demand of GEO MasterSlave Satellite Group, proposed a design after the research on its minimalist model and working mode. The program clarified the specific design and key technology of the InterSatellite TC&R Link with features of Low consumption, easy engineered and reliable. Analysis of the design result shows that master can fulfill the ISL TC&R task with 2 slaves in only one ISL TC&R channel, enabling the achievement that 50% reduction of active device configuration and nearly 50% reduction of power consumption compared with traditional FrequencyDivision mode. The interSatellite TC&R coverage produced by Omnidirectional antenna ensured the reliability and stability of the link, which better met the user’s need.