In view of the fact that few previous studies have systematically studied the influence of fracture properties on the seepage characteristics of the slope with cracks, based on Geostudio software, the numerical simulation is conducted on the influence of different fracture properties on the seepage characteristics of the soil slope with fissures. The simulation results show that under rainfall condition, the increase range of the pore pressure of the crack surface and watercontaining rate of the soil slope with fissures is larger than that of complete soil slope, and the progress of its wetting front is more thorough. Under different depths, the deeper the depth of fissures is, the larger the high pore pressure and the volume watercontaining rate area inside the fissure are, the larger the maximum pore pressure is. When the cracks are located at the upper place and the middle place of the soil slope, the pore pressure of the fissure surface shows linear increase law, below the altitude of the fissures, the pore pressure is gradually declining, there is no significant effect of the rainfall on the pore pressure change of the lower place inside the fissures, however, the pore pressure demonstrates linear increase trend. There is negative correlation between crack angle and water volume in the soil and the increase rate of pore pressure.