The political development process of the Central Asian countries is a process of state construction and political system modernization. In this process, countries not only have to solve the problems of “de-Sovietization” and localization of power structures, but also deal with the problems of the construction of nation-states. Over the past 20 years since independence and transition, the five Central Asian countries have built power structures and political systems that are in line with their own development conditions on the basis of the principle of separation of powers. However, most Central Asian presidential systems have not yet experienced normal regime rotation, and their constitutional democratic systems have not completed institutional consolidation. Therefore, although the presidents of these countries have unshakable political prestige, as leaders enter the period of “old man’s rule”, political power becomes stronger. The structural and institutional contradictions of the system are also becoming increasingly prominent, and may pose a real threat to the stability of the regime in the post-“old man’s rule” period.