It is known that in parallel with the change of social life, the values formed in humans change the essence of social relations. This, in turn, leads to certain changes in the form and nature of the criminal proceedings. Thus, opinions on the necessity of changing the legal norms ensuring the legal regulation of newly-arranged and modified issues are voiced. In this article, in this respect, the main advantage of being a legal-legal act is that it is operative, reacting immediately to the changes. The article analyzes the main trends of the constitutional-legal regulation of the criminal proceedings and sets out specific ideas for improving the legislation in this area. Criminal procedural law contains the legal norms regulating criminal-procedural legal relations. According to the theory of law, criminal-procedural legal relations can be viewed in two ways: broad and narrow. In the broader meaning of the legal relationship, the form of special social interaction is understood to have occurred objectively before the law. In a narrow sense, the word "legal relationship" is understood to be one of the types of social relationships that the law norms set.