Statistical and visual research on blockchain literature is helpful to discover the research hotspots, research fields and evolution trends of blockchain. This paper obtains 1, 216 important papers by searching the theme of “blockchain” keywords on CNKI. First, this paper makes a statistical analysis of the number of articles published, the institutions that issued the articles, co-occurrence of authors, and citations of important documents, etc. , to understand the current status of blockchain research. Second, this paper uses CiteSpace for visual analysis to show the research hotspots and evolution of blockchain in terms of keywords, time zone distribution, etc. Finally, the paper discusses the blockchain thought, core technology and application fields from three dimensions. Studies have shown that：blockchain literature has shown an explosive trend in recent years, involving a variety of disciplines；hot topics mainly focus on smart contracts, financial technology, digital currency, e-government and other fields；blockchain applications have been extending to multiple disciplines and fields, becoming the main supporting technology of the next generation of information revolution, and promoting the integration and development of emerging technologies.