Interception project is a useful measure to guarantee the discharge in the dry season.Hence,the determination of the location of interception project is of great theoretical and practical significance.Based on the hydrological model and boundary conditions,numerical simulation method is used to study the seepage characteristics of interception project area.The results show that if the project implemented,considering the intercepting seepage discharge and some negative influences,the second interception program will be better than the first program.This conclusion provides a theoretical basis for choosing the location for the interception project.