惯性定位系统在区域测量、海洋和航空测量等方面均有广阔的应用前景。惯性测量精度通常要求比惯性导航精度高几个数量级。为此，从惯性平台到数据处理计算机的接口是很重要的。该文介绍了对一种惯导系统数据接口的分析，以及惯导系统与数据处理计算机的接口电路的设计。实际使用结果表明，分析结果是正确的，接口电路工作可靠，功能较为完善。 Inertial positioning system in the area of ​​measurement, oceanographic and aeronautical measurements have broad application prospects. Inertial measurement accuracy usually requires several orders of magnitude higher accuracy than inertial navigation. For this reason, the interface from the inertial platform to the data processing computer is important. This paper introduces the analysis of an INS system data interface and the design of interface circuit between Inertial Navigation System and data processing computer. The actual use of the results show that the analysis results are correct, the interface circuit is reliable, the function is more perfect.