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One of the most significant goals that must be guaranteed for high-speed railway systems is safety. A new model is constructed for high-speed railway accident analysis with interval type-2 fuzzy DEMATEL method based on the 24Model. Specifically, the 24Model is introduced to identify the accident factors from four stages at the individual and organizational levels. The DEMATEL method is combined with interval type-2 fuzzy sets to analyze the key causations of the accident considering the interrelationships between factors under an uncertain environment. A specific case of the “7.23” Yong-Tai-Wen railway accident is employed to validate the proposed model. The analysis results show that poor management of the ministry of railways, imperfect rules and standards and little supervision or inspection are core organizational factors that lead to accidents. Besides, unsafe material conditions and unsafe human conditions are the direct causes of the accident which are easily influenced by other accident factors. The relevant managers need to strengthen the inspection to ensure the safe operation of the high-speed railway.
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