To effectively prevent and control the risk of subway waterlogging accidents,a quantitative analysis method integrating the AcciMap model,FAHP,and triangular fuzzy DEMATEL-ISM method was proposed to investigate the causes of urban subway waterlogging accidents and their coupling associations.Accident causation factors were selected from the system level through AcciMap model.FAHP was used to integrate expert opinions and determine expert weights.The DEMATEL method was used to calculate the importance of accident causes,ISM method was used to reveal the relationship between factors,and a multi-level ladder stepwise graph was constructed.The model was validated by waterlogging accidents on the Zhengzhou subway.The results showed that the core contributing factors leading to the incident were inadequate awareness and prevention measures of major disasters by the management department,the lack of diligence in supervision and inspection duties by regulatory authorities,and ineffective response and handling by operational departments.These factors can be paid special attention to prevent system failures.