In order to grasp the inherent law of the theoretical innovation of Marxism in China, we must seek the logical main line of this theoretical activity. From the perspective of practice, the logical main line of Sinicization of Marxism is the Chinese construction of modernization. Theoretically speaking, the construction of Chinese modernity is the theme of Sinicization of Marxism. Therefore, the construction of Chinese modernity is an important perspective to study the Sinicization of Marxism. The Communist Party of China has continuously promoted the Sinicization of Marxism and provided different modernization programs in different historical periods. The new democratic theory founded in the revolutionary period is a revolutionary modernization plan. During the period of socialist construction, the traditional socialist modernization program was formed. Since the reform and opening up, in the process of Sinicization of Marxism, the modernity with Chinese characteristics has been gradually constructed, which transcends the traditional socialist modernity and Western modernity. As an open theoretical system, the construction of modernity with Chinese characteristics is still in progress. At present, the urgent theme of the Sinicization of Marxism is to focus on the Chinese road and construct a unique modern discourse system from all dimensions, especially the value dimension.