针对长方形禁飞区下,近距离交会对接过程提出任意初始状态下轨迹安全的判断方法.先分析CW方程描述下相对运动轨迹的性质,通过分析轨迹与禁飞区最可能相交的特征点的分析和轨迹越过禁飞区相交问题的判断,判断轨迹是否安全.仿真结果表明所提出的安全判断方法能准确给出轨迹是否安全的结论,且算法简单、计算量小. A method of judging the trajectory safety under any initial condition is proposed for the process of docking and docking in the no-fly zone of a rectangular area. The characteristics of the relative trajectories under the CW equations are analyzed first, and the most likely intersections between the trajectories and the no-fly zones are analyzed And trajectory crossing the no-fly zone to judge whether the trajectory is safe or not.The simulation results show that the proposed safety judgment method can accurately give the conclusion that the trajectory is safe, and the algorithm is simple and the calculation is small.