Based on the design, review and construction experience of more than a dozen geotechnical slope reinforcement, the author discusses the depth of force transfer of prestressed anchor cable, the concept of free section, the safety factor of slope cutting and excavation, the formation of "rock shell" by group anchors, and the reinforcement of tension. This paper introduces the excavation control deformation construction method in slope treatment. The main elements of the construction method are: safety monitoring, advance support, stratified excavation, timely slope support, strengthening slope bottom support and construction technology management. This paper mainly discusses the stress analysis of cement mortar core column in the drilling of prestressed anchor cable, and puts forward the prestressed anchor beam structure by attributing the problem to the stability of the compression rod. The structure greatly improves the bearing capacity of the prestressed anchor cable.