Abstract: To investigate the mechanisms and influencing factors of ice accretion on transmission lines, computational fluid dynamics is employed to establish a full-process prediction model for ice accretion. Based on the Euler-Lagrange model, the air flow characteristics, motion trajectories of supercooled water droplets, and their collision patterns with conductors under varying wind speeds are analyzed. Simulations of practical cases demonstrate the evolution of ice morphology over time. As ice accretion progresses, the ice layer gradually adopts an elliptical shape and develops an aerodynamic tip effect, which subsequently alters droplet collision rates and further modifies ice morphology. The proposed dynamic model provides a theoretical foundation for predicting and mitigating ice-related hazards on transmission lines.