Combining with the large finite element analysis software ANSYS,taking the Shuanghe Hydroelectric Project Sluice as an example,the paper studied the gate base seepage characteristics with deep overburden and complex foundation. Through the calculation analysis under different working conditions,all kinds of combinations,obtained the seepage flow,seepage slope and seepage pressure with impervious curtain depth change. The results show that under the existing anti-seepage measures,the seepage flow is not larg...