Abstract：The study on the geological environments and the features of perilous rocks shows that 37 dangerous rock bodies are found along the Fangzhuang section of Road S233 in Jiaozuo city. The perilous rocks in the study area can be divided into three types according to their controlling factors: the first type was formed by faults,the second one was the result of gravity caving and human activities,and the third one was caused by the weathering of two sets of joints and human activities. On the basis of above sudy,this paper evaluates the stability and dangerousness of perilous rocks by using the fuzzy comprehensive decision method and puts forward their respective control schemes for defferent types of perilous rocks.

Keyword：perilous rock;stability analysis;risk evaluation;Road S233;