The invention provides a vibration damping device for a power transmission tower. The vibration damping device comprises a shock absorbing base arranged at the bottom of the power transmission tower and a vibration damper arranged inside the shock absorbing base, wherein the vibration damper comprises a four-column hydraulic vibration damper, a plurality of transversely arranged first single-column hydraulic vibration dampers and a plurality of longitudinally arranged second single-column hydraulic vibration dampers; the four-column hydraulic vibration damper is arranged between the shock absorbing base and angle steel at the bottom of the power transmission tower; the first single-column hydraulic vibration dampers are arranged between the shock absorbing base and node plates at the bottom of the power transmission tower; and the second single-column hydraulic vibration dampers are arranged between the shock absorbing base and the node plates at the bottom of the power transmission tower. Through the vibration damping device, the vibration frequency and amplitude size at the bottom of the power transmission tower in the transverse direction and the longitudinal direction can be reduced, the effect of an earthquake on the power transmission tower is effectively inhibited, and the safety performance of the power transmission tower is improved.