Through the forms of structure of the state as an external factor, on the one hand, and the institutions of power as an internal factor, on the other, the content and institutional features of the constitutional legislation of the Republic of Kazakhstan (RK) in the process of its inter- action with other branches of the legal system are considered. The structural composition of which is regulated in the Law of the R & Kcy; "On Legal Acts", according to which the legal system is made up of the Constitution, corresponding legislative acts located according to the status of the owners, other normative legal acts, as well as the Constitutional and Supreme Courts. This means that in the process of their interaction, the assimilation of legal norms and their structure occurs. This phenomenon is of particular interest in New Kazakhstan, the theses of which affected the structure of constitutional legislation. In this regard, on the analysis of the current law of the R & Kcy;, the concept of which is given in Art. 4 of the Constitution of the R & Kcy;, doctrine, scientific works in the field of constitutional law, theory of state and law, law enforcement, the national model of the structure of the R & Kcy;, its problems, implementation mechanisms, prospects, evolutionary paths of development and features as an institutional phenomenon are examined. Empirical analysis states the characteristics and features characteristic of the structure that determined the place, role and meaning of the Constitution in the structuring of constitutional legislation. And, as a result, attention is focused on improving the structure and tightening the responsibilities of all branches of government in lawmaking and the law enforcement process. On their basis, scientific and practical conclusions are formulated, and the structure of the constitutional legislation of New Kazakhstan is proposed.