Power transmission line three-dimensional design method and system

The invention discloses a power transmission line three-dimensional design method and system, and the method comprises the steps: carrying out the live-action modeling of the landform of a region where a to-be-constructed line region is located, and obtaining a three-dimensional model of the to-be-constructed line region; establishing a power transmission line component model database; planning and designing a power transmission line path in the three-dimensional model and carrying out tower ranking design to complete three-dimensional construction of the power transmission line; and outputting the three-dimensional model of the power transmission line. The system comprises an oblique photography module, a three-dimensional design module and a VR display module which are connected in sequence, the oblique photography module is used for acquiring oblique photography data of a line area to be constructed; the three-dimensional design module is used for generating a three-dimensional model of the line area to be