Abstract: 　　Ultra-high-rise buildings are characterised by many fire hazards and difficult rescue and evacuation, in order to accurately evaluate the fire risk of ultra-high-rise buildings, a risk evaluation index system is established from four aspects, namely, fire prevention capability, fire extinguishing capability, safety evacuation capability and fire management capability, and the combination of the indicators is empowered based on the idea of game theory, which to a certain extent reduces the subjectivity of the evaluation, and a mathematical evaluationmodel of the attribute is established at the same time, to solve the problem offuzzy attributes of the indicators. The problem of fuzzy attributes, and finally take a super high-rise building as an example for verification. The results showthat the fire risk of the building is general safety, and the evaluation conclusions drawn are consistent with the real situation, proving the reliability and accuracy of the model. Meanwhile, it is necessary to carry out risk investigation on automatic sprinkler system, automatic alarm system and fire hydrant system to reduce the fire risk of this building.