Abstract: This paper describes the components and features of the antenna measurement system for the compact test range built in China Academy of Space Technology by analyzing the source of measurement errors, the necessity for upgrading the measuring apparatus, and the new application of software for measurement. It has been proved in practice that through theoretically analyzing the test data in the real compact range, errors resulted from nonideal factors can be eliminated, and accurate results can be obtained while ignoring some unimportant factors to simplify the test practices.