Abstract:The distribution of the axial stress and shear stress along fully grouted rock bolt under tensile load is very complex. Many experiments have been done for this purpose. Based on the conclusions and the distribution of the stress gained by experiments,the shear stress distribution of fully grouted rock bolt can be described theoretically by some mathematical expressions. The shear stress is zero in some zone where decoupling appeared. The magnitude of the shear stress linearly increases from 0 to the peak shear strength at the interface which has no decoupling. And then the shear stress decreases exponentially to 0 with increasing bolt embedded length. An illustrative example is introduced. The calculated stress curve of the bolt is consistent with experiment conclusion. It reveals that the distribution of the axial stress and shear stress along a full grouted rock bolt under tensile load can be described by this method.