Abstract: At present, China's construction industry professionals are mainly migrant workers, the industry is characterized by population, fluidity big, poor living environment, workers' quality is generally not high, is a typical prone to the spread of the disease, as a result, public health and epidemic prevention work of the construction industry is an urgent need to pay attention to the problem.Based on field research, this paper adopts brainstorm method to construct the index of public health epidemic prevention system of construction projects.Through the establishment of the binary fuzzy analytic hierarchy process, the weight parameters of each epidemic prevention index are given.Then by using the fuzzy comprehensive evaluation method and the designed two-point evaluation standard, the public health epidemic prevention ability evaluation system of the construction industry is constructed.Finally, the rationality and accuracy of the evaluation system are verified by the application analysis of specific engineering examples. The results show that the constructed public health epidemic prevention system has good applicability and can accurately and objectively reflect the public health epidemic prevention ability of the project department.