In this study, we first conducted a statistical analysis of safety accidents in China's construction industry recently, studied the causes of the accidents, and summarized them. We used the IAHP to calculate the weight value of each factor leading to the occurrence of engineering accidents. Combined with the basic principle of TOPSIS method, we established a construction engineering safety accident evaluation model. Finally, the applicability of the model was verified using an example. The results show that the model can clearly show the lack of construction engineering safety management, especially for the evaluation of multiple projects and its usability.