The essence and the reasonable kernel of the Chinese traditional way of thinking is one of the most important sources for the theoretical system of socialism with Chinese characteristics. And it also has been inherited and developed in the theoretical system of socialism with Chinese characteristics, which is reflected in the following ideas: the thought changing from pragmatism to the combination of theory and practice, the thought changing from the combination of one and more things to the unity of domination and diversity, the thought changing from the gradual and orderly progress to the combination of “touching stone across the river” and the “top level design”, the thought changing from “paying attention to holism” to the unity of overall thinking and coordinated development, the thought changing from harmony to the combination of harmony and seeking common ground while reserving differences, and the thought changing from the unity of knowing and doing to the unity of cognition and practice. Therefore, the study of Chinese traditional wisdom in the theoretical system of socialism with Chinese characteristics is good for China to strengthen national culture self-confidence. Also, it is beneficial for the persistence and development of socialism with Chinese characteristics. What is more, it is useful for China to make the sinicization of Marxism be available.