Abstract: Powerline construction is a very important part in the power transmission and transformation project.The traditional method is through the arc-sag,but the efficiency is very low and cannot be widely used when passing across high-speed or high-speed railways.This requires using of prefabricated wire-laying technology.The total station instrument with the prism measurement method was proved,but there are also hidden dangers.This article combines the actual project,focus on the application of three-dimensional laser scanning technology in the assembly powerline construction.

Key words: 3D lasers canning, assembly line, SX10, Trimble RealWorks