Security is a necessity for human survival and development, and also an essential guarantee for the development of civilization. The security state of Chinese national modern civilization has embodied in the inheritance and innovation of its material form, the orderly operation of its system form and the self-reliance of its spiritual form. In its safe development, strategic opportunities coexist with risks and challenges. In the face of exchanges and collisions among civilizations worldwide, it is necessary not only to prevent the infringement of both national and historical nihilism and the risk of deconstructing the discourse of "Western-centrism", but also to seize the great opportunity to realize China's great rejuvenation. To build a "sense of security" for Chinese modern civilization, we must adhere to a systematic thinking, deeply examine various systematic elements of civilization construction, and make concerted efforts from principle, subject, content, system, practice and other dimensions, so as to achieve its stable development.