月球南极地区潜在水冰资源储量丰富，是未来月球就位探测的重要目标区域。然而极区地形崎岖，光照条件时空变化剧烈，为巡视器开展探测任务带来严峻挑战。长距离巡视任务要求探测器在行进过程中始终具备稳定的光照观测环境，针对这一“追光”移动需求，本文提出一种长距离太阳同步路径规划方法。方法基于时空图搜索框架，构建满足空间连通性与光照连续性的时空光照走廊；设计融合几何距离、障碍风险及光照余量等因素的改进A*代价函数，实现满足持续光照约束的长距离全局路径规划。采用月球南极沙克尔顿陨石坑附近真实地形与光照数据开展验证实验。结果表明，在满足巡视器通行能力与工程约束的情况下，规划方案能有效保证巡视器在任务周期内始终处于安全光照窗口。成果可为未来月球南极长周期巡视探测任务的路径规划与光照安全保障提供技术支撑。

The lunar South Pole holds abundant reserves of potential water ice resources, rendering it a vital target for future lunar in-situ exploration. However, the polar region features rugged terrain and drastically spatiotemporally varying illumination conditions, which pose severe challenges to the rover’s detection missions. Long-distance traversal missions require the rover to maintain a stable illuminated observation environment throughout its travel. To address this light-chasing mobility requirement, this study proposes a long-distance solar-synchronized path planning method. Based on a spatiotemporal graph search framework, the proposed method constructs a spatiotemporal illumination corridor satisfying both spatial connectivity and illumination continuity. An improved A* cost function integrating geometric distance, obstacle risk, and illumination redundancy is then designed to achieve long-distance global path planning under continuous illumination constraints. Validation experiments are performed based on the actual topographic DEM data of the vicinity of Shackleton Crater in the lunar south pole. The results show that, while satisfying rover traversability and engineering constraints, the planned path can effectively ensure that the rover remains within a safe illumination window throughout the mission period. This study provides technical support for path planning and illumination safety assurance in future long-duration lunar south polar rover exploration missions.