What causes rock-fall is the influence of inner formation conditions and external trigger factors.Based on a lot of field investigations and laboratory study

the paper does the research on that how different factors exercise the multiple-layered and different influences on rock-fall

such as engineering geological rock group

fault density

grade

slope height

PGA

average daily maximum precipitation and vegetation coverage.Using analytical hierarchy process and geographical information systems

the paper gets the map of hazard distribution of rock-fall and conducts hazard assessment of rock-fall in highly seismic region of Longnan

Gansu.It is the basis that doing research into correlation between different influence factors and rock-fall

and the method of rock-fall hazard analysis and zonation presented in this paper has some practical value.