English：

Construction safety in building projects is characterized by multi-party participation, redundantdata and complex risk factors, this paper draws on the stress test methods of the financial industry toconstruct a construction safety risk stress test and evaluation system, to further optimize constructionsafety risk control measures and reduce the probability of accidents and the numbers of casualties. Theconstruction safety risk is regarded as a system, the safety system level is divided, the stress evolutionmechanism of the safety system is sorted out by using the mutation theory, and the risk stress test modelbased on the mutation fuzzy membership function method is established, to carry out quantitative analysisand divide the system pressure level. Finally, the model was applied to the safety risk assessment of aproject in Xi’an. The results show that, the overall risk of the project is low, and the establishedevaluation model can effectively determine the safety system pressure state and system pressure level atthe current stage, and provide a decision-making basis for construction safety management.