The traditional tunnel safety early warning methods have some problems, such as the inflexible information transmission, the non-intuitive expression effect and more. Otherwise, the deepening application of BIM Technology in the field of shield tunnel has not been widely valued. To solve these problems, BIM Technology is introduced to realize fast and reliable tunnel structure analysis and safety early warning visualization method. First of all, the model and data transformation between BIM and Finite Element Model (FEM) are realized with the help of socket program and code so that the rapid finite element analysis based on BIM modeling is realized. And then the paper visually displays the structural safety status of calculating structural safety factor by using the visual advantages of BIM, and realizes the tunnel structure safety early warning visualization technology based on BIM and mechanical analysis. The results show that the proposed method of visual expression of safety warning has good effect on tunnel engineering.