Abstract: With the rapid development of road network, water network, power grid, etc., the construction of transmission lines crossing is becoming more frequent and more difficult, facing more severe challenges. Traditional crossing structures such as bamboo crossing structures and column-type crossing structures have certain shortcomings and cannot meet the high-altitude crossing construction requirements under the new situation. This article proposes the use of modified cranes without crossing structures and without blocking the network to cross elevated structures for the demolition of old lines and corresponding safety management and control, which can effectively improve construction efficiency, shorten the construction period, and reduce safety hazards.