Abstract: Network cultural security has become an important part of national security, and cultural identity is the core of maintaining network cultural security. At present, China's cultural identity is still facing many difficulties, such as the obstruction of the adherence and inheritance of excellent culture, the prevalence of "Western paradigm", the serious problem of pan-entertainment in the cultural field, and the overseas influence of Chinese culture needs to be improved. We must pay attention to the construction of cultural identity as a way to improve network cultural security to improve the overall national security level.