The overall goal of this research is to explain Turkey's regional policies and its impact on the national security of the Islamic Republic of Iran. The two countries of Iran and Turkey are competing with each other as two regional powers in various fields including economy, geopolitics and expansion of the sphere of influence, and although there has been security and stability in the borders of both sides for more than 400 years, but the competition between them and the conditions The instability of the region can lead to serious challenges at any moment. In this research, the study of Turkey's policies and its effect on the military security of the Islamic Republic of Iran is considered as the main goal. The research method used in this research is descriptive (case-based) with a combined (mixed) approach. Regarding each of the variables and cases mentioned in the operational definition of the research variables, the researcher collected sources and interviewed experts and finally analyzed the collected information qualitatively and then analyzed the information quantitatively and the questionnaire and combined both, using It uses a mixed approach to research in the above way. In the descriptive statistics section, information will be shown using frequency distribution tables and graphs, and hypothesis testing will be done in the inferential section.
Keywords: politics, Turkey, Iran, Syria, Iraq, national security