Abstract:Due to the extremely high magnitude,long duration of vibration and the complicated geo-environment in disastrous area,the Wenchuan 8.0 earthquake produces not only a huge number of landslides and rockfalls,but also a series of complicated dynamic processes involved in their occurrence,such as very common loosing and cracking of mountains,unique shattering-sliding,extremely powerful dynamic process of large-scale or individual rock block ejection,long distance motion etc.. They are quite different from the characteristics of landslides and rockfalls under general gravity force,and present knowledge is very limit in this field. In order to describe above-mentioned special dynamic processes of shattering-cracking,the shattering-sliding,shattering-falls and ejection are defined. Combining with the slope structures,a mechanism classification system of strong earthquake-triggered landslide and rockfall are suggested,which includes 5 categories and 14 types. In addition,the basic characteristics,dynamic processes and geomechanical conceptual models of some typical types are analyzed,especially the type of shattering-sliding for most large-scales landslides is involved. The formation mechanism,geomechanical models and dynamic features of landslides and rockfalls triggered by Wenchuan 8.0 earthquake are revealed.