The internationalization level of postdoctors is closely related to the construction of world-class universities in China. At present, there are some problems in the development of China's post-doctoral system, such as the low proportion of foreign and overseas doctoral students in the total number of post-doctoral students, the few opportunities for local post-doctoral students to go abroad, and the insufficient degree of internationalization of research results. The reasons for the problems are the strategic defects in the policy formulation of post-doctoral internationalization, the lack of attractive funding and the insufficient publicity of post-doctoral internationalization. To improve the internationalization level of Chinese postdoctoral, we need to increase the dispatch of domestic postdoctors, implement the policy of differential funding for foreign postdoctoral and strengthen the international exchange of postdoctoral system.