This transmission line renovation project starts from existing 220KV Langpeng 2R42 line and the Pengzhou 2R48 line and ends at the Daishan Substation, with total length of 2*22.046km. Guishan long-span line adopts 2*JLB23-565 aluminium-clad steel stranded wire under operation temperature of 130℃ for conductor and two 36-core OPGW for ground wire. The maximum design reference wind speed of the Guishan long-span line is V-44m/s ,with the ice of 5mm.