Prestress constant-resistance large-deformation yielding anchor rod

The constant-resistance large-deformation yielding anchor rod with the prestress comprises a constant-resistance sleeve and a rod body, inner rib lines are carved on the inner surface of the constant-resistance sleeve, a crack is longitudinally formed in the constant-resistance sleeve, outer rib lines corresponding to the inner surface of the sleeve are carved on the tail portion of the rod body, and the outer rib lines and the inner rib lines are matched with each other. A nut and a tray are sequentially arranged on the periphery of the end, close to the same end of the constant-resistance sleeve and the tail of the rod body, of the constant-resistance sleeve, a cone is arranged at the end, away from the nut, of the other end of the rod body, the working resistance in the yielding process is determined by the rib grain density and the crack width, and the yielding amount is determined by the length of the constant-resistance sleeve. The balance point of the yielding amount and the working resistance needs to