Shift Foregin Policy of the United States in Central Asia and it's Impact on tht Security Environment in the Islamic Repuplic of Iran

September 11 attacks on New York’s world trade center towers was a significant turning point for major developments in international system, regional order and existing concepts. After the attacks, the Middle East became the pivot of U.S Foreign Policy, considered to be a block on its worldwide hegemony. During the recent years, however, a new approach can be detected in U.S Foreign Policy with the shift moving from the Middle East to the Central Asia. The present paper tries to explore the shift in U.S Foreign Policy, its implications for the security sphere of the I.R Iran, and proposing specific approaches to counterbalance it. Explaining the conceptual framework of the research first, a quantitative method is being used in order to collect the required data. The findings of the study which has been analyzed using discourse analysis shows that: the shift in U.S Foreign policy has directly resulted in economic, political instability in the region, in turn creating political, cultural, security and economic challenges for Iran, Russia, China, and India. In doing so, proposals are made to reassuring Iran’s political, cultural, security and economic interests which has been challenged by U.S increasing engagement in the Central Asia region.