This paper discusses syncretized Marxism and gives a definition of cultural confidence and its connection to China’s socialism. Firstly, the paper explores the strategy of Sinicizing Marxism from Yan’an to the present era and demonstrates how the culture that was practiced in a Marxist way then is the basis of the current Chinese people’s cultural autonomy, with examples from practical life. Next, the paper tells about the global and information-based character of China’s cultural environment and how far building cultural confidence has developed in those mentioned conditions. It then talks about the way of defending and promoting the socialist culture via legal and theoretical instruments, which is a statement that changing the system of culture and forceful leadership of the party is definitely a decided matter. Speaking of cultural enterprises, the text underlines the role of market-driven operations and technological innovation; it also suggests that with the ongoing supply-side changes, it is possible to get enriched with cultural products and achieve the identification of local people. The third paragraph discusses the results of two case studies, which are the safekeeping of intangible cultural heritage in rural areas and the setting up of an international platform for public opinion exchange through a “going global” strategy. At the end of the essay, the author introduces a series of countermeasures, e.g. reinforcing theoretical education, leading public opinion with the help of cultural education and practice platforms and so on, to combat ideological and external cultural challenges, providing a framework to conceptualize Sinicization of Marxism and cultural confidence in a more systematic way.