Abstract: The high voltage tower is a rod-shaped structure,which is very sensitive to horizontal, settlement and tilt deformation,simulated high voltage tower is used to provide auxiliary decision for real scanning.In this paper, the experimental method of fitting plane is adopted to evaluate the positioning precision of the single point,and the single point positioning precision under different distance and density,the methods and steps of data extraction and tilt analysis are also introduced.The experimental results show that the data collection of the high voltage tower is suitable for locating the station at about 10m, and the density is set at about 0.002m;take the southwest tower leg as an example,the research shows that the maximum deformation is on the horizontal projection,a method for extracting deformation of high voltage tower is provided.