Abstract：This paper studies on the issue that US pulled out of Intermediate-range Nuclear Forces Treaty (INF Treaty) and briefs the significance of INF Treaty and the main reason of the US withdrawal. According to public reports, it addresses the US new intermediate-range missile plan and main development project, and analyzes the threat resulted from the new intermediate-range missile. Finally, the paper provides the inspiration and reference to the development of air defense equipment and the support for future development of equipment.
