针对飞航导弹高度通道测试技术多以定高特征点性能检测为主,无法对整个工作过程进行全面考核的现状,从无线电高度表的测试技术出发,介绍了其测高工作原理,分析了现行测试方法的不足,提出了过程测试方法;通过对现有自动化检测系统进行功能扩展,研制了基于PXI总线的导弹高度通道动态测试系统,实现了无线电高度表的过程测试,并在导弹全弹道仿真中得到了应用,为飞航导弹其它控制环节的动态检测技术提供了参考与借鉴. Aiming at the fact that the testing technique of flight path altitude altimeter is mainly based on the high performance test of feature points, it is impossible to conduct a comprehensive assessment of the entire working process. Based on the testing techniques of the radio altimeter, the principle of altimetry is introduced. This paper proposes a process test method. Through the function expansion of the existing automatic test system, a dynamic test system of missile height channel based on PXI bus is developed, and the process of testing the radio altimeter is realized. Has been applied for the other parts of the flight control missile dynamic detection technology provides a reference and reference.