In 2016，under the grim situation of network security，the critical information infrastructure is being attacked more and more frequently. The United States，Japan，the United Kingdom and other countriesare gradually improving the critical information infrastructure protection policies and regulations. China is also making the protection of critical information infrastructures to the focus of national cyber security strategy. It is of great significance to analyze the key actions of the international critical information infrastructure and put forward the concept of network security protection for the critical information infrastructure in China，which will play an active role in the international cyberspace game.