Abstract: Engineering safety evaluation is the core and key to realizing the “four pre” of engineering safety.However, the traditional method is difficult to obtain the engineering safety state comprehensively, reliably and in real time.Combined with the construction of digital twin water conservancy projects, a research on comprehensive evaluation model of engineering safety was carried out in this paper, and the overall technical route of comprehensive evaluation of engineering safety was put forward.By constructing the comprehensive evaluation system of engineering safety, the evaluation rules of measuring points and step-by-step evaluation rules were formulated.By integrating safety monitoring data, structural calculation results and inspection information, the safe operation behavior of the project was comprehensively judged.At the same time, based on the digital twin platform framework, the comprehensive evaluation function module of engineering safety was integrated and developed.The research results have been preliminarily applied in the digital twin Danjiangkou project.The model evaluation results are reasonable and the functional integration scheme is feasible, which can provide reference for similar digital twin projects.