Abstract: Guizhou is in a typical mountain terrain. There are many highrisk rock fall bodies in and surrounding the urban area of the city. With the increase quality of life, the instability induced by these highrisk rock falling bodies has drawn more and more attentions by the public and governmental agencies. This paper presents the investigation and remediation of rock fall hazards in Guiyang City. Factors, such as; topographical conditions, geological conditions od bedrock, tectonic structures, degree of weathering and unloading effect on the rock outcrops, role of surface and groundwater, vegetation and human activities; that might attribute to the rock falls have evaluated. The remediation measures are also proposed in the paper.

Key words: High-risk Falling Rock Body, Rock Fall Formation Factors, Prevention and Remediation