Abstract: The shear strength parameters of potential slide seam are drawn out by back analysis and experience analogy. The shear strength of slide seam would constantly decline because the water intenerates it. Based on further calculation and analysis, rechoose parameters and work out remainder glide-strength. Complying with the rules of safety, economy and feasibility, according to structural character of rock mass, geometrical nexus of rock stratum occurrence and unfavorable geological condition, the route of the zone divides into three segments whose emphases on treatment or deformation monitoring.