Abstract:This paper analyzes the background, construction goals, and expected benefits of big data platform of the nuclear power enterprise''s construction, and expounds the forward-looking, scalable, open, high performance, stability, security, and easy maintenance, practicality, high availability, unified management and other principles that architecture design must follow.With the open-architecture-oriented design guidelines and the layered architecture, which provide detailed analysis of the roles and levels of the data generation layer, data exchange layer, data computing layer, data storage layer, data service layer, and data application layer. The specific technical solution used. The article uses the intelligent distribution function of letters based on big data and machine learning, and the classification and statistics of valve defects based on real-time calculation. These two cases are examples, illustrating the application scenarios of big data technology platform in the actual business of nuclear power enterprises. The detailed technical framework and application effects are introduced, and the changes and business benefits brought by the application of big data technology platform to nuclear power enterprises are explained.