Concrete face rockfill dams vary in structural dimensions. Efficient and refined analysis methods are important tools in seismic research of the face-slab dams. In this paper, via combining the non-linear scaled boundary polygon element method with efficient quadtree discretization technology, the application of high-performance refined analysis of the concrete face dam is investigated. Firstly, the static and dynamic analysis and permanent deformation calculation of the same face-slab dam model are carried out by using the scaled boundary polygon element method and the traditional finite element method. Subsequently, combined with the quadtree discretization technology, the high-efficiency cross-scale fine analysis of typical face-slab dam structures is applied. The computation results indicate that:(1)the two methods are in good agreement, indicating that the scaled boundary polygon finite element method is an effective tool in the analysis of the dam. (2)The scaled boundary finite element method can be seamlessly coupled with quadtree technology for efficient cross-scale fine analysis applications, and is efficiently in the reconstruction of analysis model, which greatly improve the analysis efficiency. Thus it is concluded that this method can provide technical support for study of local damage evolution and progressive damage of structures.