Abstract: China's manned lunar exploration (MLE) project employs a circumlunar rendezvous and docking flight plan, which involves multiple spacecraft and flight phases. Given the system's complexity, various risk factors, and high mission costs, it is essential to consider mission replanning under various fault scenarios to ensure astronaut safety and maximize mission benefits. Firstly, the mission replanning problem is defined, categorizing it into four types: mission reconstruction, mission adjustment, mission degradation, and mission abortion. Subsequently, the studies on replanning methods across different flight phases of the MLE mission are systematically reviewed, from the launch phase to the lunar return phase. Then, four key technologies that still require breakthroughs to address the replanning problem are concluded, including fault diagnosis, detection and prediction, multi-objective optimization and degrading objective decision, integrated mission planning, and highly robust and real-time mission replanning technologies. Finally, the characteristics and challenges of the replanning problem are summarized and a forward-looking perspective on future developments is offered.

Key words: human lunar exploration, faulting, risk management, replanning, orbit design