超低空突防是目前远距离空地导弹对地攻击的最为有效的突防模式，而预先对导弹突防路线进行航路规划则是灾防成功与否的关键。本文系统地给出了航路规划的设计思想、数学原理和路径生成方法，定量描述了威胁场和地形的数学模型。同时运用威胁场分区规划法、遗传算法，以及最优控制专家知识库的全新的寻优方法对复杂环境进行搜索，并引入模糊数学进行评估决策，从而产生最佳实防路径。 Ultra-low-altitude penetration is the most effective penetration mode for long-range ground-to-ground missiles to ground attack. However, it is the key to successful disaster prevention whether to pre-route the route of the sudden-advance missile defense. This paper systematically gives the design idea of ​​route planning, mathematical principles and path generation methods, and quantitatively describes the mathematical model of threat field and topography. At the same time, we search the complex environment by using the new optimization method of threat field partitioning, genetic algorithm and knowledge control of the optimal control expert, and introduce the fuzzy mathematics to make the evaluation decision, so as to produce the best path of real defense.