针对导弹天线罩这类薄壁复杂回转体测量的难题，提出了一种新的测量原理，研制了专门的天线罩几何参数测量仪，设计了测量的软、硬件系统。介绍了测量仪的工作原理、测量系统的构成以及误差评定和数据处理的方法，并给出了测量实践结果。测量仪使用结果表明，实现了对工件准确、快速、经济的自动测量，以及对测量结果的评定和可视化处理，取得了满意的效果。 Aiming at the difficulty of the measurement of thin-walled complex rotors such as missile radome, a new measurement principle is proposed. A special radome geometric parameter measuring instrument is developed and the software and hardware system for measurement is designed. The working principle of the measuring instrument, the composition of the measuring system, the methods of error evaluation and data processing are introduced, and the measuring results are given. The results of using the measuring instrument show that the automatic, accurate and rapid automatic measurement of the workpiece is realized, and the evaluation and visualization of the measurement result are achieved. The satisfactory results are obtained.