Abstract: After the leakage accident of a sour gas well station, how to make scientific and effective emergency decision is one of the practical problems faced by the government and enterprises. In this paper, 18 factors affecting the emergency decisionmaking of leakage accidents in sour gas well stations are screened out, and a six- level hierarchical structure is established by Interpretive Structural Modelling (ISM). On this basis, the interrelation among various factors is deeply analyzed, and the factors are classified. Relevant decision-making improvement measures are put forward. The results show that the Interpretive Structural Modelling- Matriced'Impacts Croises- Multiplication Appliance Classement (ISM-MICMAC) reveals the influence of many factors on the emergency decision-making of leakage accident in sour gas well stations, and can provide necessary decision-making support for emergency rescue.

Key words: fire fighting, sour gas well station, emergency decision, influence factor