The article is devoted to the topical issues for the methodology of modern comparative research in education, which at the moment in the information age should be interdisciplinary in describing and explaining the educational phenomena and practices; build on the results of research in other areas of knowledge and carried out by specialists from different scientific fields. In modern conditions, the interdisciplinary of comparative research requires an expansion of the framework of this approach, their orientations to results of new disciplines taking into account electronic means of the analysis and assessment of data with the prospect of moving from interdisciplinarity to transdisciplinarity. The interdisciplinarity in comparative research is studied in the works of foreign and domestic scientists. The article says that in different states of the post-Soviet space. Various problems of interdisciplinarity are explored in the context of comparative pedagogy. The article explains the concept of the local interdisciplinarity which applied in modern comparative pedagogy; the concepts of comparative and comparativist studies are explored on the basis of the morphemic analysis of the suffix use in Russian and English; the results of the analysis of interdisciplinary indicators in the field of educational institutions, including the digital environment, are presented; reveals some aspects of expertise available in an interdisciplinary perspective.