摘要：China is the starting point and pioneer and driver of the Silk Road Economic Belt; Russia is located in the throat place of the belt; and India is at the joint of the belt and the Maritime Silk Road. China, Russia, and India as the brIcs countries are geo-connected, easy to reach a consensus because of their common and similar interests. The three countries also have common inherent demands and strategic directions： connectivity, complementarity, taking advantage of the great powers of Eurasia and sea-land compound, moving toward the grand trend of modern international economy and technology development. Promoting the construction of the Silk Road Economic Belt accords with their respective interests, and is their common interests, which decide that China, Russia, and India are the key factors and dominant forces in the construction of the belt.