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In recent years, the low-orbit large-scale constellation satellites has flourished, resulting in a sharp increase in the number of satellites in orbit. Firstly, the challenges of long-term management of satellite constellation in orbit are analyzed. According to several common application scenarios of long-term management of satellite constellation in orbit, the anti-interference mechanism of TT&C transponder with spread spectrum system is analyzed theoretically. Combined with the simulation verification of ground concept satellite platform, the situation that long-term management of satellite constellation in orbit can appear through ground concept satellite platform in micro wave darkroom is verified The simulation is carried out. Simulation of different constellation satellite in orbit operation scenarios and the corresponding measurement and control response strategies verify the feasibility of the satellite long-term management strategy when multiple satellites enter the country at the same time, and give the effective response strategy of constellation satellite in orbit long-term management. It provides a reference for long-term satellite in orbit management and subsequent large-scale constellation rail long tube problems that may be encountered.