Abstract: Substantiated by the processes of expanding regionalization and globalization structure of international legal relations becomes more complicated, as well as develops its complex types. Trade agreements as a type of international treaties that used to be sign only between the states to regulate their trade and economic relations, concede to the agreements between the more considerable subjects of international law. Such trend is also applicable to the processes currently taking place in Eurasia: the rapid process of concluding trade agreements between the integration association – the Eurasian Economic Union (EAEU) on one hand, and its partner nations on the other. One of such agreements became the Agreement on Trade and Economic Cooperation between EAEU and China, signed on May 17, 2018 within the framework of the Astana Economic Forum. The analysis of the indicated document seems especially relevant for determination of the effects of its signing and scenarios of further cooperation, particularly in terms of integration of the EAEU and China’s initiative “One Belt – One Road”. The author concludes that this non-preferential Agreement sets a high standard of regulation in various spheres of international economic relations; improves the terms of accesses to the China’s market with the domestic goods through simplification of the trade procedures and promotion of the transparency level. The Agreement can become an efficient basis for the future practical implementation of the concept of Big Eurasia.