Abstract: Since the 18th National Congress of the Communist Party of China, Xi Jinping has published a series of important speeches on the overall layout of “Five in One” and the strategic layout of “Four Comprehensives” for the state governance, which has formed a scientific theoretical system with complete system and rigorous logic. From the historical materialism viewpoint of “the economic base determines the superstructure”, Xi Jinping always emphasizes that development is the top priority of the party in governing and rejuvenating the nation and it is crucial to solve all problems in China, and we should always adhere to the basic line of taking economic construction as the center in practice. This paper uses the research method of text mining to study Xi Jinping′s important expositions on socialism economic construction with Chinese characteristics, finding that Xi Jinping′s economic thought of socialism with Chinese characteristics is a systematic science which takes the new development concept as the main content, the modern economic system as the strategic goal, and the high quality development as the fundamental requirement, so it is full of practical philosophy wisdom and strong problem consciousness, embodying the value of people-oriented; Xi Jinping′s economic thought of socialism with Chinese characteristics in new era is the developed contemporary Chinese Marxist political economy based on China′s national conditions and development practice. It is not only a realistic response to the economic problems in China under the new historical conditions, but also an action guide to lead the new development of socialism economic construction with Chinese characteristics in the new era.

Key words: new development concept, modern economic system, text mining