Abstract: Based on the hydrogeological and engineering geological conditions of a mine in Xuzhou, it designed the structure of water-retaining wall under the condition of high water pressure, and it carried out simulation analysis for the stability of this structure by using inverted truncated cone-shaped water-retaining wall and three-dimensional numerical method. It mainly studied the changes of stress, strain and displacement of water-retaining wall and the surrounding rock under the water pressure of 6 MPa, compared with the situation under the water pressure of 3 MPa and 10.8 MPa, it obtained that there was no noticeable displacement and strain variation for the water-retaining wall unit under the high water pressure of 10.8 MPa, which met the requirements of safety production, and provided theoretical basis and foundation for water-retaining wall design of 6 MPa water pressure in the construction of the mine.