The development of emerging media presents the “Janus face” of technology: it brings convenience and prosperity, but also implies risks and crises. To some extent, the evolution of emerging media forms is promoting the development of emerging media to a macro context. In such a context, “security” is constantly on the agenda of national policies and media. As an important category of security issues,national security issues also show new types and characteristics in the new context. Due to the prominent nature of security discourse, national security issues in the context of emerging media are not only a problem with both traditional and non-traditional security, but also a discourse process and micro practice participated by emerging media, interwoven in politics, military, economy, culture, society, science and technology information and other aspects of holistic national security and show the characteristics of generalization, acceleration, hybridization and cross domain. Behind the emergence of these issues, it involves an important conceptual mechanism “securitization” in the security concept of constructivism. This paper holds that holistic national security issues have experienced two kinds of securitization process in the internal and external environment of emerging media construction. In this process, various interwoven security issues integrate different subjects and multiple actors into the technology of emerging media. In the logic of technology, a new type of risk with discursivity between subjects and derivative between fields comes into being. Theoretically and practically, the understanding of the context composition, type characteristics and process mechanism of holistic national security issues can provide a general antecedent reference for the construction of the overall cyberspace security governance system.