Abstract: Eurasian Economic Union is a Russia-dominated regional economic integration organization. Since its official operation on January 1, 2015, its organization structure has been clear and it has expanded its memberships swiftly. It has been the foremost target to establish cooperation relation with European Union and seek a win- win situation for the connections of Russia and Eurasian Economic Union with external economic organizations. Meanwhile, it has the intention to become a bond and bridge that link Europe and Asia-Pacific and realize the strategic connection of "One Belt, One Union". The establishment of Eurasian Economic Union is favorable for the free flow of regional production factors, and the promotion of economic growth of the member countries. In the future, Eurasian regional cooperation still needs Russia's dominance, while Russia will also advance the development of Eurasian Economic Union with great efforts. The in-depth intervention of the countries and organizations like the United States, European Union, NATO, etc in the Commonwealth of the Independent States will make the external environment of Eurasian Economic Union more complicated.
Key words: Eurasian Economic Union; Commonwealth of the Independent States; regional integration; internal structure; external connections