Abstract: This paper presents a calibration beacon scheme based on bulk acoustic wave delay line, introduces the principle and calibration method, analyses the precision and design parameters. Reality test result shows that this calibration beacon method has the advantage of high calibration precision, strong anti-interference capability, easy operation, and all weather used, which could solve the problem in the traditional calibration method in the fire control radar network system. And it also can be used to examine static linkage accuracy in fire control radar network system.