The article is devoted to the study of the constitutional reforms of the Republic of Kazakhstan during the period of independence, with an emphasis on their role in the modernization of public administration. The study contains an analysis of all stages of constitutional development: the transitional model of the 1993 Constitution, the consolidation of the presidential model of government by the 1995 Constitution, the reforms of 207 and 2017 related to the redistribution of powers between the branches of government, as well as large-scale changes in 2022 aimed at rolling back the model of super-presidency and the restoration of the Constitutional Court. The purpose of the study is to identify patterns and results of constitutional reforms in Kazakhstan, to determine their importance for institutional development and democratization.

             The results of the study: it is proved that the 1993 Constitution was of a transitional nature and did not fully ensure the stability of the balance of the branches of government; the 1995 Constitution consolidated the presidential model, ensuring stability but limiting democratization; the reforms of 2007-2017 demonstrated a course towards institutional modernization, but did not change the situation of the actual dominance of the president; The constitutional reform of 2022 represents a large-scale transformation of the system of government: the parliament has been strengthened, the judicial body of constitutional control has been restored, and human rights protection mechanisms have been expanded. A comprehensive assessment of all stages of constitutional development has been carried out in terms of their contribution to the evolution of the public administration system. It is revealed that constitutional reforms in Kazakhstan performed a dual function: stabilizing and modernizing, gradually expanding the space for democracy.