提出了一套用于数字地形图中求取最佳路径的算法。算法的核心是改进的动态规划算法，同时还用到图像和图形处理中的一些算法，如图像的膨胀，图形的扫描线转换。分析了算法的计算复杂度，包括时间和空间复杂度。该算法的适应性和稳定性较好，在大多数的情况下能给出符合实际的结果算法还加入了最大爬升角和最小转弯半径这两个飞机机动参数。作为一套完整的考虑飞机机动参数的算法，具有高效稳定和符合实际的特点。 A set of algorithms for finding the best path in digital topographic map is proposed. The core of the algorithm is an improved dynamic programming algorithm, as well as some algorithms in image and graphics processing, such as image expansion and graphics scanline conversion. The computational complexity of the algorithm is analyzed, including time and space complexity. The algorithm has good adaptability and stability, and in most cases it can give realistic results. The algorithm also adds two parameters, namely, the maximum angle of climb and the minimum turning radius. As a complete set of algorithms to consider aircraft maneuver parameters, it has the characteristics of high efficiency, stability and practicability.