Slope stability quantitative evaluation method considering earthquake damage degradation

The invention discloses a slope stability quantitative evaluation method considering seismic damage degradation. The method comprises the following steps: step 1, obtaining seismic wave data of an evaluation area; step 2, acquiring earth surface point cloud data of an evaluation area; 3, drilling to obtain underground rock stratum information and a rock core of the evaluation area; 4, detecting physical and mechanical parameters of a standard test piece made of the rock core; 5, establishing a three-dimensional geologic body model; dividing the three-dimensional geologic body model into a plurality of units; step 6, carrying out initial balance calculation on the divided units; step 7, inputting seismic wave data, and performing seismic simulation; 8, calculating damage distribution and a damage value of the model subjected to seismic simulation according to a damage degradation formula, and further degrading mechanical parameters of units in the numerical model according to the damage value; and 9, calculati