Abstract: In the construction process of Anqing product pipeline crossing river course project,pipeline crossing will affect the seepage of river channel and embankment.In this paper,the finite difference method is used to analyze and calculate the seepage stability of the embankment after the pipeline crossing,and groundwater flow numerical simulation model is established.Based on the analysis of numerical simulation results of groundwater flow and the application of critical hydraulic gradient method,the possibility of seepage failure by directional drilling crossing river course is analyzed quantitatively.