In the era of globalization，global overseas study has developed new trends and characteristics，including more and more emerging nations and regions strive to develop its international education system and the reverse flow of international students from developed countries to developing countries. China as the biggest international students exporting country，its outflow of students accounts for a quarter of the total number of international students in the world. Hence，the transnational flow of Chinese student has an important influence on the development of global overseas studies. This paper analyzed the main characteristics of overseas study of China in 2015 which covers three aspects：overseas students，overseas returnees and oversea students studying in China. For example，the growth rate of Chinese students studying overseas is slowing down，however，it is still higher than the growth of domestic education enrollment scale. More and more primary and secondary school students choose to study abroad and the choices of major become more diversified. Overseas students also are confronted with fiercer competition both in domestic and international job markets. And their enthusiasm for returning back to China to start their own businesses and engage in innovative ventures is sparked. Furthermore，returned overseas students demonstrate outstanding performance in the area of charity work and social development，and they are more willing to participate in politics. Another conclusion we draw from this study is that the countries along the “the Belt and Road （B&R）” has become the most important source countries of international students in China. Based on analysis of these characteristics，this paper puts forward several suggestions on strengthening services for oversea students，optimizing the environment of innovation and entrepreneurship as well as promoting the sustainable development of studying in China.