Abstract: Taking a high slope as an example,the causes of local deformation are analyzed according to the basic characteristics of the high slope.The stability was evaluated quantitatively.A comprehensive treatment scheme of brush slope unloading+miniature steel pipe pile+drainage system+greening is finally adopted according to the analysis.The change of soil shear strength index before and after grouting is obtained through testing and monitoring results,and the change of slope stability before and after reinforcement is analyzed and compared.It reflects the confirmation of the information to the slope stability,and has certain refrence role in the treatment of similar high and steep slopes in the future.