This article analyzes the relationship between the phenomenon of fragmentation of international law and integration processes aimed the modern global transformations. Various approaches to understanding the fragmentation of international law are considered, including its causes, forms, and consequences. The article examines how fragmentation impacts the functioning of international integration entities, the development of interstate relations, and the effectiveness of international legal regulation. Particular emphasis is placed on the role of fragmentation as a conducive factor for the advancement of international integration and the establishment of specialized legal regimes within integration associations. Consequently, the degree of fragmentation in international law within established regions correlates with the level and depth of integration. In the current context, the fragmentation serves as a favorable element for participating states in fostering their integration interactions. In addition, international law functions as a crucial instrument for regulating these integration processes. The methodological foundation of this article comprises well-established general and specific methods of scientific research. The article’s purpose and objectives are to investigate the degree of influence and the nature of the interaction between the fragmentation of international law and modern international integration processes.