Abstract: Ｉn view of the ambiguity of various factors affecting the uncertainty of coal mine fires, the set pair analysis method is introduced into the mine fire risk assessment, and a four-element connection number model based on set pair analysis is established. We establish 2 levels of 11 evaluation indicators from three aspects: internal fire, external fire, fire management and disaster relief system, and use the analytic hierarchy process to determine the weights of indicators at all levels. We use this evaluation model to evaluate the fire risk of a certain mine in Suzhou. The results show that the four-element connection number evaluation model based on set pair analysis has the advantages of simple operation and overcoming the difficulty of quantifying the fuzzy factors in the system. It can not only analyze the current safety situation, but also can make reasonable predictions of risk trends.