Abstract: Reuse technology is an effective way to improve the economy of space missions.For the reuse requirements of reusable spacecraft systems, the number of reuse and the reliability of the system，especially the electronic system，were evaluated. Based on the classical methods of reliability evaluation such as mathematical model method and component counting method, the reliability model of the recoverable spacecraft system was established. The power subsystem and recovery and landing subsystem of the recoverable satellite were analyzed as examples. The influence of maintenance activities on reliability is studied, and the integrated model of system inherent reliability and maintenance reliability is established. The evaluation model of system reuse times based on maintenance effect is established, and the system reuse times are evaluated. The reliability of the model is verified by examples, the influence of typical parameters such as service age factor and failure rate on the system reliability is analyzed, and the required conditions for the system to be reused more than 50 times are calculated.