Distribution characteristic of thrust force of a slope is analyzed using transfer coefficient method for stability analysis of slopes.Main sliding sect of slope is considered as reinforcing object of the prestressed cable.Considering the resisting force of stopping slide sect and the thrust force of slope upper sect

the calculation formula of prestressed cable hold force and the relationship between prestressed cable design strength and its set distance are developed with the slope safety being satisfied in advance;and a design method of prestressed cable for soil slope is put forward.The method is simple in form and easy in application.It is shown that the design strength and the set distance of prestressed cable is directly made certain using this method;and that the stability coefficient satisfies engineering need automatically.Finally

an engineering project is illustrated

and good results are obtained.