[en] The traditional nuclear safety culture improvement work in is mainly about propagandize, training, and behavior observation to instill the concept. The Lack of systematic evaluating and closed-loop management makes it difficult to ensure the effectiveness. Based on these, the nuclear safety culture improvement management research work was carried out. This article proposes a nuclear safety culture dynamic improvement model and some practical applications has been carried out based on the model. Firstly, a nuclear safety culture standard that can reflect the international advanced experience and the characteristics of Chinese culture is developed; Secondly, a continuous improvement of nuclear safety culture evaluation methods and mechanisms is established, and the nuclear safety culture evaluation management system is designed and developed with the whole process of the data acquisition, storage, analysis, processing, and feedback; Finally, a comprehensive nuclear safety culture quantitative evaluation model combining Back Propagation (BP) neural network and Analytic Hierarchy Process (AHP)-Fuzzy comprehensive evaluation method is designed and applied based on the use of evaluation data and the fuzzy mathematical theory, data validation shows that this model can be used for evaluating the comprehensive grade of nuclear safety culture in NPPs, and providing basis for NPPs and corporate to monitor the nuclear safety culture level.