The working principle and composition of a certain type of artillery servo angle test system are introduced,the test system of gear transmission chain in the azimuth angle measuring device and the calculation of angle measurement accuracy are analyzed and explained. Through the three- dimensional modeling software UG NX,the three- dimensional model of azimuth angle measuring device is built,and the data interaction with mechanical dynamics simulation software ADAMS is realized,the virtual prototype model is established in ADAMS and the dynamics analysis of virtual model is completed,the speed of input,output shaft of azimuth angle measuring device and the time domain regularity curve of gear meshing force are obtained,the theoretical reference for further studying the characteristic of artillery azimuth angle measuring device gear transmission system is provided.