Based on shearing slide constitutive model of the interface between anchorage body and hole wall,with load transmission method,a elastic-plastic space model was set up,and the theoretical study on the distribution law of shearing stress along the length direction of anchor bolt was carried out.It was concluded that the distribution laws the interfacial shearing stress at different location are different,interfacial shearing stress primarily distributes at the about 4.5m long end of anchorage section.It provide a theoretical basis for the design of prestressed rock bolt.