Abstract: Based on the field investigation and analyse of interior adit data of Daliushu high dam at Yellow-river Heishan gorge, five types of dyna-relaxing of rock mass are divided as following:the unloading, the topple,the down layers, the fault dominating and the joint and crevice dominating. Each type is summarized as one corresponding model,which can provide,scientific proofs for utilizing and ameliorating of the special rockmass.