Abstract: In recent years, frequent ice disasters have brought serious impacts to the social economy and people's life. Especially in the field of electric power, the impact of ice-accreting disasters on transmission lines is very significant. Analyzing the dynamic impact of ice-accreting on transmission lines has an important theoretical and applied values for guiding the design, operation and maintenance of transmission lines in ice-prone areas, and for improving the ice-resistance and disaster mitigation capability of transmission lines. The current research on ice-shedding jumps focuses on the impact of Ice-shedding jumps on conductors, and there is insufficient research on the comprehensive impact of the tower-line system. We established a finite element model of tower-line system, calculated the dynamic impact of tower-line system under simultaneous ice-shedding, one end ice-shedding, central ice-shedding and two ends ice-shedding, and analyzed the conductor ice-jumping height, tension, imbalance tension, insulator deflection, and tower pole member axial force. The results show that, under the simultaneous ice-shedding mode, the conductor displacement, tension and unbalance tension amplitude are large, the insulator vibrates violently, the tower part of the rod stress is large, and the axial force of the main material occurs in the process of tension-pressure-tension to change the direction repeatedly. Under the other three modes, the conductor ice jump height, tension and unbalance tension amplitude, the insulator's offset amplitude are small, the attenuation speed is fast, the tower member stress is obviously reduced, the main material axial force of tower leg does not occur in the direction of the change of direction phenomenon. From the response of each position, two ends ice-shedding is the most appropriate way to ice-shedding.