Abstract: A highway slope anchor is taken as an example. The methods failure criteria and procedures of the existing anchoring construction anchors are intredused. The experimental process and the acquired experimental data in the practical project are offered. The achieved experimental data and several cases of a serving anchoring project anchor stretch-draw damage are analyzed and calculated. It illustrates how to use field drawing experimental results to determine the design parameters of the relevant strata prestressed anchors. The ultimate pullout capacity of different prestressed anchors are compared. The pratical free end elongation and theoretical elongation of anchors are compared and analyzed. The factors which affects tension deformation and damage of prestressed anchors are discussed combining with the test process of a practical project. Finally, some conclusions are drawn.