With the emergence of miniaturization and lightweight of airborne lidar of unmanned aerial vehicles,the technology of airborne li-dar of unmanned aerial vehicles can quickly acquire three-dimensional spatial information data in the power corridor.Through point cloud data filtering and classification,it can provide high-precision plane section data,wind deflection point and danger point data for the de-sign of power corridor,which has significant characteristics such as high efficiency,good precision and strong reality.The engineering practice shows that after reasonable design navigation height and overlap degree,the obtained laser point cloud data can meet the technical requirements of the horizontal section,house distribution,wind deflection point and danger point measurement in the construction drawing stage of power lines,and can meet the accuracy requirements of line cross-crossing measurement under the condition that the point cloud density is greater than 15 points/m3.But in densely wooded areas of the mountains,the laser point cloud data obtained cannot directly meet the technical requirements that the elevation error of the base section should not be greater than 0.1m
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