Abstract: Seepage stability is an important factor to ensure the safety of underground mining when mining ore bodies under rivers.To analyze the influence of the Toudaoyangcha river on the seepage stability of underground mining in Sansheng Iron Mine,based on the hydrogeological concept model,the seepage characteristics under the influence of underground mining disturbance in Sansheng Iron Mine were analyzed by using Flac3D numerical analysis software.The results show that the stoping is less affected by the seepage of the river level,and there is no water inrush risk in the mine.The calculation results can provide a reference for safe mining in mines.