Difficulties of large height difference of construction surface, small working site and complicated formations of dangerous rock exist in Suofengying hydropower station of Wujiang project with several fracture zones distributing in the mountain, the borehole must be drilled through fractures. The paper introduces the special construction technology used in upper anchor cable construction for Dr2 dangerous rocks in Suofengying hydropower station, where it has 110～134.5m height difference to the lowest platform.