This article emphasize the importance of considering political mechanisms for a thorough understanding the phenomenon of national security. The focal point is the relation between politics and security problems which is explored through a research in the context of diverse approaches and theories. The definition of security, there are many different viewpoints, denoting situation on the one hand, the lack of a coherent system of thought on security and on the other hand, the incomplete development of the concept itself. The paper exsmines the process of rethinking of national security, were the Copenhagen School (Critical studies) has the considerably role. Substantial national security concepts and paradigms are analyzed own. They highlight the most important issues of national security which forms or should form the objective of political research, including in Republic of Moldova