Abstract: Under the dual pressure of the economic crisis and technological change, major changes have taken place in the global monetary and financial system. This paper uses bibliometrics to analyze the topics of digital currency based on blockchain technology aiming to grasp the current situation and research content of digital currency. The results show that digital currency research is in a rapid development stage and the regional characteristics are obvious. The security and privacy of digital currency, blockchain technology consensus algorithms, the energy consumption of the blockchain in the mining process, transactions security based on Ethernet and smart contracts, financial supervision of digital currencies, and machine learning are the main research contents of blockchain technology in the application of digital currency. In the future, blockchain technology will face severe challenges, including the research of encryption technology, the security of smart contracts, consensus mechanisms, scalability, and financial supervision. This article is expected to provide guidance and suggestions for the future development and policy formulation of blockchain technology in the digital economy.

Key words: Blockchain, Digital Currency, Situation Research, Topic Clustering