Abstract: As an important force leading the development of the global blockchain, U.S.'s practices is worth discussing and using for reference in promoting the development of the blockchain. This article analyzes relevant U.S. initiatives from the perspectives of R&D, supervision, standards, etc.. It is found that the U.S. Office of Science and Technology Policy has not made blockchain development a priority, but the government’s support for blockchain has been extended to many fields; the development of the U.S. Congress has changed from laissez-faire to the establishment of a clear regulatory system, and the states have become more active in the supervision of blockchain; mastering the international initiative and solving the industry standard problems is the main approach to the construction of blockchain standard system. It is claimed that the current prospect of the integration of blockchain and non-financial fields has emerged. Chinese government should increase its support for key blockchain technology and application research, improve the definition and classification of digital assets, establish a blockchain testing and certification standardization national laboratory, avoid improper constraints on technology and industrial development, and set up an extensive blockchain evaluation system.

Key words: U.S., Blockchain, R&D support, Supervision, Standards