With the improvement of BD / GPS system positioning accuracy and the popularity of attitude azimuth measurement system, BD / GPS and attitude azimuth system are used to provide a new method for realtime calibration of airborne direction finding system. In order to improve the accuracy of the standard system of airborne direction finding system and overcome the problems encountered in the system calibration method, the basic principle and system composition of the airborne direction measurement system based on BD / GPS azimuth system are given, The hardware and software design scheme of the airborne calibration system based on BD / GPS azimuth system is realized. The method of obtaining and processing the azimuth reference data of the standard calibration process is analyzed, and some problems needing attention in the calibration school are analyzed. The calibration system is simple to design, does not need to carry on the transformation to the surveying equipment, the adaptability, may provide the military and the civil airborne direction measuring system to provide an effective means.