Abstract:The types of anchorage are divided into the surface-type and the interior-type. Based on the Kelvin¢s solution of displacement,the distributing expressions of the shear stress and the axial force in the interior-type anchorage are derived,which have a same form as those of the surface-type. The only difference between them is the parameter,which shows that their mechanical characters are similar. Subsequently,the mechanical characters of the separate-stretched anchorages are discussed. The advantage or disadvantage and their adaptive conditions are analyzed at last.