Abstract: Hidden danger investigation and governance is the top priority for coal mine enterprise safety management. With the development of informatization, coal enterprises have accumulated a lot of hidden danger data. How to effectively use these historical data has become a new problem and challenge of current safety informatization construction in coal enterprises. In this paper, it first put forward the concept of coal mine safety hidden danger governance knowledge base, and then expressed the hidden danger governance knowledge with production representation. Secondly, it elaborated the key steps of fuzzy grouping and empirical analysis through the analysis of hidden danger historical data in several mining bureaus of Shenhuo Group, which based on fuzzy grouping technology provided by Microsoft SQL Server integration service platform, and it built a set of perfect mine safety hidden danger governance knowledge base on this basis. Furthermore, it expounded the application of the knowledge base in the whole closed process of hidden danger governance, which provided the new solution to improve governance ability and efficiency.