Abstract: In slope stability analysis，the selection of rock mechanical parameters has direct influence on the result of the calculation.In order to improve the accuracy of numerical simulation results，using the landslide measured data，such as the radius of sliding surface，sliding surface center coordinates and safety factor，and combining with orthotropic test，BP neural network and limit equilibrium theory，the back analysis of shear strength parameters of fault，dolomite and mica rock are carried out.Comparing monitoring data of landslide with the calculation results，the range and location of landslide is close to the monitoring data of landslide，which indicates that the method of this back analysis is feasible and accurate.Finally the inversion results are adopted to make numerical simulation analysis of deep mining for open-pit mine and make the evaluation of the stability.

Key words: Monitoring data of landslide, Rock mechanical parameter, Back analysis, Stability analysis