At present,three-dimensional models of domestic high-voltage transmission line towers mostly rely on professional modelers to refer to the corresponding design parameters and use CAD software to create manually.The workload is large,time-consuming and laborious, and it is difficult to meet the needs of rapid digital modeling of high-voltage transmission line corridors. To this end, a component-based modeling method for the three-dimensional model of the transmission tower is proposed to satisfy the modeler's rapid and high-precision three-dimensional reconstruction of the transmission tower.By decomposing the existing three-dimensional models of different types of power transmission towers, a full-element component model library of power transmission towers is established, so that different components in the model library can be automatically spliced according to their fixed connection relationships.When modeling a specific tower, the user only needs to specify the type and height parameters of the transmission tower, and perform the model direction and the width of the tower head.Fine-tuning can obtain a high-precision three-dimensional model of the transmission tower. This method can reduce the difficulty of three-dimensional modeling of transmission line towers, improve the modeling efficiency, and meet the engineering application needs of rapid digital modeling of power line corridors.