Abstract: In order to reasonably select the grouting pressure and master the general rule of grouting pressure on the dam body,the problem of controlling grouting pressure in the actual production is solved.Based on the knowledge of split grouting theory and the introduction finite element technology,the control of splitting grouping pressure is analyzed and studied based on ANSYS general software platform.Through the establishment of the three-dimensional finite element model of the earth dam,the numerical simulation analysis is carried out to remove the suitable grouting pressure from the dam,and the general rules about the influence of different grouting pressure on the internal stress,strain,displacement and grouting pressure of the dam body are summarized.The results show that the fracturing grouting pressure can cause the displacement of the dam body.The displacement of the dam body and grouting hole changes with the level of the water level.The action surface of split grouting is upright,which can change the magnitude and principal stress of the dam to meet the requirements of anti-seepage reinforcement.The contour maps of the grouting holes at the top of the dam are compared,and the appropriate grouting pressure can be selected.