The invention discloses a method for suppressing the waving of an extra-high voltage bundled conductor and belongs to the field of power transmission. According to the method, a rotatable wire clamp is arranged and can freely rotate within a certain range in the axial direction of holding a conductor core center; according to the characteristic that eccentric torsion occurs under the action of gravity when the conductor is coated with ice, the rotatable wire clamp is utilized and freely rotates in the axial direction of holding the conductor core center; and within the rotating range, the conductor is coated with the ice, and the eccentric torsion occurs under the action of gravity, so that non-round section can be effectively avoided, and lift force or torque cannot be exerted on the conductor which is blown by wind. According to the technical scheme, a structure that the conductor held by the rotatable wire clamp can freely rotate along the longitudinal axis of the conductor is adopted; and on the premise of changing and adjusting parameters of a conductor system, the phenomenon that the non-round section is formed when the conductor is coated with the ice is avoided, so that an effect of suppressing the waving of the extra-high voltage bundled conductor is achieved. The method can be widely applied to the field of the suppression of the waving of the extra-high voltage bundled conductor.