Abstract: Results of investigation shows that the distribution of geological hazard has distinguished area character by Han-Cheng big fault. Although there are a lot of cracking and pit in the earth of the fault, in the east loess plateau area, the mainly hazards are landfalls and landslides. After researching, we believe the causes of geologic hazards are different according to its distribution. The falls and slides are caused by natural geology factor in the east area of the fault, and it also influenced by groundwater and earthquake. In the west, happening of the geologic hazards are closed related to human beings' engineering activities.