The 3D geological modeling method that supports the structure–attribute integrated representation is one of the keys and difficulties in the research of 3D modeling. Existing 3D geological modeling technology is difficult to realize the integration and expression of the prior knowledge of geological structure and attribute analysis and simulation. Taking Xixian new area as an example, a unified regional geological structure framework model is established. Under the constraint of geological structure conditions, three–dimensional structure–attribute integrated expression are realized. This method not only retains geology structural modeling, but also can more reasonably show the spatial distribution and change of geological attributes inside the strata It has been applied in engineering geological investigation and urban underground space development.