The paper focuses on ice accretion growth, anti-ice the critical current and melting ice by load current of high-voltage transmission lines, and carries related studies. Using a combination of theoretical and experimental way to prove the accuracy of the theoretical model. 论文分别就高压输电线路覆冰增长、防冰临界电流及负荷电流融冰三方面开展研究,采用理论与试验相结合的方式阐述了理论模型的准确性。