Data resources are views as the oil in the new age.The sharing and exploitation of data resources is critical for China to realize the B＆R Iniative.As the largest owner and administrator of data resources，government's attitude towards “open data” has a directly impact on the effects of the political，economic and cultural cooperation of all the B＆R countries.this chapter will investigate and analyze the policy planning and practical application about data open in the B＆R countries，especially the cases of South Korea，Estonia，Czech，India and Kazakhstan，including their experiences as well as weakness.Meanwhile，some countermeasures and suggestions regarding the joint exploitatation and sharing of data resources among the B＆R countrieare proposed in this chapter，including the proposal that suggests incorporating big data cooperation into the bilateral cooperation mechanism of the B＆R initiative，enhancing the construction of transnational shared database，promoting the foreign aid projects on big data，encouraging Chinese big data enterprises to expand international business in the B＆R countries，and accelerating the development of think-tank products based on big data.