The relation between wedge body and the model of cutting slope is shown. Then analytical method of relaxation zone for cutting homogeneous slope by elastic theory is given. The stress field of cutting slope can be analyzed by elastic wedge body theory. On the basis of elastic plane-strain theory

the relaxation zone related to one safety factor can be calculated according to Mohr-Coulomb law and single tension intensity principle that are both related to the same safety factor after three-dimensional stress field of the cutting slope is got. After every cutting step is completed during excavating the whole slope

its corresponding relaxation zone can be calculated. The main calculation procedure of relaxation zone for cutting slope is given. After every cutting step is completed during excavating a slope step by step

the corresponding relaxation zone for the whole slope can be calculated by main discussing stress field of the slope after last step

additional value of stress field of the cutting slope on current step and local relaxation zone for the slope related to current step. Finally

explicit calculation procedure of analyzing relaxation zone for cutting slope by elastic wedge body theory and strength criteria of slope material is given in detail by an example.