Abstract: Because of active earthquake and fault, the engineering geologic condition of Kizil reservoir dam is complexly. The dumping slope in the right abutment ofmain damhas cracks now. According to structural stability analysis, it is known that when earthquake happens, safety coefficient of structural stability of the dumping slope is a little small and its safety can not be ensured. Thus, the occurrence possibility of landslide is relatively great. The dumping slope is close to the main dam, therefore if a massive landslide happens, great waves that landslide results would threaten dam safety. Monitoring facilities should be increased for deformation measuring of the dumping slope, and rehabilitation measures should be taken if necessary.