Slope anchor cable is a kind of prestressed steel strand that passes through the slope sliding surface through the stable rock mass fixed on the slope surface by the outer end and anchored within the sliding surface at the other end, directly generating anti-slip resistance on the sliding surface, increasing the anti-slip friction resistance, and making the structural surface in a pressed state to improve the integrity of the slope rock mass, thereby fundamentally improving the mechanical properties of the rock mass, effectively controlling the displacement of the rock mass, promoting its stability, and achieving the purpose of rectifying the smooth layer, landslide, dangerous rock and dangerous rock.