Abstract: During the process of open-pit coal mining, the 3D geological model of the mine is constantly changing. It is necessary to update the geological sectional view accordingly to truly reflect the current geological structure and stratigraphic properties of the mine. A method for updating sectional view automatically associated with mine 3D geological model is proposed to address the problem of inaccurate sectional view updates caused by poor interaction between internal graphic element attribute information and spatial information in current sectional view updating methods. By designing conceptual and logical models of the relationship between 3D geological models of mines and sectional view elements, the association between model elements and sectional view element object names can be achieved. By setting the positioning coordinates of horizontal and elevation positions on the sectional view, the objects obtained from the section are associated with the corresponding sectional view positions, achieving the association between the spatial position coordinates of the model elements and the sectional view elements. The purpose of associating the 3D geological model of the mine with the attribute information, spatial information, and other graphic data of the sectional view is achieved. The method determines the area that needs to be updated based on the changed graphic elements in the 3D geological model of the mine. The method extracts various section lines within the area, and obtain corresponding sectional views based on their correlation relationships. Further, by traversing and judging the status of the graphic element attribute update flag and geometric update flag, the method automatically updates the sectional view elements with changed attributes or geometric shapes in each sectional view. The application results show that this method achieves the correlation between sectional views and 3D geological models of mines, as well as automatic updating of sectional views. The accuracy of the sectional view update is verified by using this method to automatically update the positioning coordinate data in the sectional view, which is consistent with the pre update data.