The interest to evolve and implement the old idea of building mutual cooperation among the "Big Eurasia Trio", Russia-India-China, has been increasing day by day in the 21st century. This interest is aroused from the dialogue and mutual interactions between these three big civilizations complementing each other, sharing the same fears. In this paper, we mention the common cooperation and development operations between the three countries having the 40 percent of the world's total population.