The core of the digital economy is informatization，which has the characteristics of digitization，networking，and intelligence. Network security and informatization are equally important and must be planned，deployed，promoted and implemented in a unified manner. To make right the network security work，it is necessary to handle well the relation between security and development，which has to be coordinated and advanced together. Zero trust security is a security mechanism that is gradually produced in the course of network development. Through the reconstruction of a security protection mechanism that takes identity as the basis for trust，it offers a comprehensive security protection for the “people” as the core in the digital age，as well as promotes industrial，economic and social development by means of extensive coverage of security mechanisms. Looking forward，to enhance China’s cyber security，much work has to be done in strengthening the protection of critical information infrastructure，accelerating innovation and breakthroughs in core cybersecurity technologies，enhancing data security management and personal information protection，expanding the scale of the cybersecurity technology industry and cybersecurity talent team，and expanding domestic and international cybersecurity cooperation.