Overseas public security is an important part of China’s national security. In this sense，overseas public security affairs require more academic research and diplomatic attention as an independent major issue. Conceptually，there are connections and differences among overseas public security，public security，and overseas interests. From the perspective of research subjects，both individuals and enterprises are included. Overcoming the fragmentation status caused by the sovereign state system is an important way to govern overseas public security. This not only requires the construction of coordination and cooperation mechanism，mechanism，institution and hard power among multiple entities，such as domestic government，enterprises，and individuals，but also the construction of international connection and collaborative network. In short，it is essential for China to develop compound approaches to address challenges on overseas risk and enhance its overall supply capacity of overseas public security in the future.