In this study, a simplified and efficient approach is proposed to address the problem of extensive computational demands and complex modeling associated with traditional methods for calculating tower head electrical clearance. With a two-dimensional simplified calculation model established, the positional relationship between the conductor and the tower body is systematically reanalyzed. This approach avoids the time-wasting modeling processes of intricate three-dimensional and computation processes required by conventional techniques. By simplifying redundant parameters and calculation procedures, the proposed model can significantly enhance computational efficiency without sacrificing the accuracy of the results. To validate the effectiveness and reliability of the proposed model, the actual engineering data of transmission lines at Xinjiang and Northwest 750 kV two-channel double-circuit were utilized for calculation and analysis. The results demonstrate that the proposed model can satisfy the engineering accuracy requirements, with higher calculation efficiency, which offers a practical and reliable alternative for solving relevant engineering problems.