Aimed to a 500 kV power transmission line project, considering the design wind velocity increase (about 35 m/s) in micro-topography or microclimate region, the modal analysis, dynamic time-history analysis and static analysis are carried out on the cup-type power transmission tower with or without viscoelastic damper (VED), respectively. The results show that the natural vibration period of the tower increases by 14.3% after using VED; the wind vibration coefficient first increases, then decreases, with the maximum value of 28.1% appearing at the tower cross arm; the pressure of main material deduces about 14%; the calculated tower weight reduces about 5%. Therefore, the vibration control effect of VED is obvious.