Abstract: According to the characteristics of underground commercial complex fire, this study obtains and establishes a fire risk assessment index system of urban underground commercial complex, including 20 evaluation indexes by using the method of literature investigation. Then, aiming at the uncertainty of urban underground commercial complex fire, the uncertainty measurement theory is introduced, the urban underground commercial complex evaluation model based on uncertainty measurement is constructed, and the index weight of each evaluation index is determined by using entropy weight theory. Finally, taking the fire risk assessment of an urban underground commercial complex as an example, an empirical analysis is carried out. The results show that this method can be used to evaluate the fire safety level of urban underground commercial complex, and the research can provide new ideas for fire prevention and emergency management of urban underground commercial complex.

Key words: safety engineering; urban underground commercial complex; uncertainty measure; entropy weight method; fire risk assessment