The monograph examines the foundations of the theory of integration, the contradictions that have arisen, the factors and their impact on the growth of national economies. Among the problems of scientific and practical nature, the solution of which is based on the theory of macroeconomic growth, the most interesting are the identification of effective forms of integration. The article considers the current contradictions of the integration of the EAEU countries, as well as analyzes the features of the food embargo as an instrument of non-tariff regulation of world trade within the Union. It is proved that this category, being a coercive means for changing economic, political, and social conditions, includes various types of direct restrictions on trade between sovereign states. In addition, the monograph examines such a type of integration between enterprises as subcontracting and cooperation. Integration of this type allows us to reveal the potential of various enterprises, involve small and medium-sized industrial enterprises in the process, and, not least, gives a powerful impetus to the deep development of integration within the framework of the EAEU. The article presents the research on the influence of the foreign trade factor and the active participation of countries in the global division of labor on the growth of the national economy. To determine the parameters of the impact of foreign trade policy in the context of the accession of the Republic of Tajikistan to the WTO, an econometric model of growth is constructed, measured by the volume of GDP from a number of macroeconomic indicators, as well as the import tariff. The methodology of research of the modern branch market in the conditions of integration of national economies is presented. The main directions of the modern methodology of research of industrial markets, types of marketing markets and the types of market research that are in demand from business structures in the context of integration of national economies are considered. Special attention in this section is paid to the main stages of the modern process of marketing research of industry markets. The impact of the COVID-19 pandemic and measures to combat it on the cyclical dynamics of economic growth in Russia and other countries of the world is studied. Econometric models of Russia's foreign trade within the framework of the development and expansion of the EAEU have been developed. The hypothesis that in the future the growth of trade turnover is possible taking into account the GDP growth of the EAEU member states is tested. The monograph is intended for managers and specialists of public administration and corporate management, researchers, politicians, doctoral students, postgraduates and students.