Abstract: The transfer coefficient method is a commonly used method for slope stability analysis in China,which has the characteristics of wide application range and simple calculation method,however the calculation result of this method is conservative. In order to fully take the advantages of transfer coefficient method,and make the calculation results agree better with actual engineering conditions. On the basis of the traditional algorithm,the anchoring force of the anchor cable is evenly distributed on the slope element through which the anchor cable passes. The anchoring force is not regarded as a concentrated force,but the anchor pier spreads to the sliding crack surface at a certain angle along the anchoring direction. Then,the calculation formula of anchoring force of prestressed anchor cable based on the improved transfer coefficient method is obtained,which combines a certain slope project and the traditional transfer coefficient method for comparative analysis. MIDAS/GTS software was adopted to numerically simulate the anchored slope.The results indicate that the anti-sliding force obtained by the improved transfer coefficient method is relatively large,and the remaining sliding force calculation result is relatively small compared with the traditional algorithm. The improved distribution of the anchoring force of the prestressed anchor cable is more reasonable,there will be no stress concentration,the safety factor is reasonable,and it can better fit the actual engineering situation.