The anti-floating design of building is very important, and the arrangement of anti-floating anchor is one of the main measures for anti-floating in the basement. The deformation displacement of the basement and foundation is the root cause of the change of anchor force. The traditional anti-floating anchor design method ignores the difference of foundation deformation displacement and the uneven force of the bolt. Based on the BIM technology and the finite element method, the whole model of the anchor, foundation and superstructure was established to simulate the floating displacement of raft foundation under high water level. The finite element analysis is carried out under the premise of considering the upper structure load variation, the upper structure stiffness, the upper structure and the foundation. The results show that the tension of the anchor rod which is arranged by the traditional scheme design is not uniform, and there are some disadvantages, which result in waste. Anti-floating anchor arrangement is more reasonable by using BIM technology and finite element analysis and save the cost and reduce the project risk. During the change of the superstructure, the advantage of BIM technology is used to modify the data, and the cross platform will change the information into the YJK structure calculation software, and update the upper structure analysis model. The upper load and stiffness leads to changes in the re-read module based on finite element analysis of changes in the superstructure, completes the whole process from the construction project changes to the structure of linkage modification, structures the optimization design process, makes it more brief and reasonable