FAIR原则是规范科学数据管理和促进数据共享的指导原则，调查分析我国国家科学数据中心FAIR原则的实践现状，对推动科学数据的发现、访问、获取和重用具有重要意义。文章通过分析FAIR原则的主要内容，把握国际科学数据开放共享原则；调研20个国家科学数据中心对FAIR原则的实践现状，从元数据标准和用户授权两个层面分析结果并提出改进建议。研究发现：我国国家科学数据中心对FAIR原则的应用还有待提升，需要在持久性标识符的采用、元数据标准的公开访问、数据许可声明的明确等方面加强规范化、标准化管理。

FAIR principle is the guiding principle for regulating scientific data management and promoting data sharing. Investigating and analyzing the current practice status of FAIR principle in China's National Science Data Center is of great significance to facilitate the discovery, exchange, acquisition and reuse of scientific data. This article grasps the international principle of sharing scientific data by analyzing the main contents of FAIR principle; investigates the current practice status of FAIR principle in 20 National Science Data Centers, analyzes the results from two levels of metadata standards and user authorization and proposes improvement suggestions. It is found that the application of FAIR principle in China's National Science Data Centers still needs to be improved, and standardization management should be strengthened in terms of the adoption of persistent identifiers, the open access of metadata standards and the clarification of data permission statements.