The subject of the article is the analysis of the causes, course and effects of the October 2020 revolution in Kyrgyzstan. Particular emphasis is placed on the consequences of this revolution, especially on the change of the system of government in Kyrgyzstan and its impact on security in the region of Central Asia. The entirety of the normative provisions of the Constitution of May 5, 2021, and in particular the regulations regarding the mutual relations between the executive and legislative powers, proves that the presidential system of government established on its basis in Kyrgyzstan differs significantly from the classical model of such a system of government. This is evidenced primarily by the right of legislative initiative granted to the President of Kyrgyzstan, the right to participate in parliamentary sessions, and the right to determine the subject of its sessions. The October Revolution did not affect the security architecture in Central Asia directly. However, the adoption of the presidential system of government in Kyrgyzstan, the difficult economic situation, as well as unresolved social problems may result in further mass social protests in this country in the future, which may have a significant impact on the relations, especially with Uzbekistan and Tajikistan.