对于一类高阶非线性奇异摄动系统，奇异摄动分解后仍是非线性系统，不便于分析和控制律设计；对于这样的系统直接应用基于微分几何的全局等效变换方法，很多情况下会遇到由于控制量不足造成不可变换或解高阶偏微分方程的困难．本文综合了这两种方法，应用于飞机地形防撞控制律设计，取得较好的效果． For a class of higher-order nonlinear singularly perturbed systems, singular perturbation decomposition is still a nonlinear system, which is not convenient for analysis and control law design. For such a system, the global equivalent transformation method based on differential geometry is applied directly, in many cases Encountered because of the lack of control can not transform or solve the problem of higher order partial differential equations. In this paper, we combine these two methods and apply them to the control design of the aircraft’s terrain collision avoidance, which achieves better results.