The invention discloses a finite element method for precisely simulating transmission line waving through an ANSYS software. According to the finite element method, beam elements with a bending freedom degree under condensed local coordinates are adopted to simulate sub-wires of a transmission line assisted with the characteristic that stress mentoring guarantee cables only have tension; meanwhile, multiple connection modes of the sub-wires and spacers are considered, three-component aerodynamic parameters of all the sub-wires under a full-blast attack angle are precisely acquired through an icing split gas aerodynamic characteristics wind tunnel test, and then an APDL is compiled to directly load aerodynamic loads relevant to motion states; and last, precise waving simulation is realizedthrough nonlinear iteration solving. Through the finite element method, an icing multi-split transmission line waving phenomenon can be precisely reproduced, the application range is wide, and complicated anti-waving measures can be taken based on the simulation method.