Stay cable for restraining galloping of dry cable

The utility model provides a stay cable for restraining galloping of a dry cable, which belongs to the technical field of cable-stayed bridge engineering and comprises a twisted steel wire bundle, a protective sleeve and a restraining structure, and the protective sleeve is sleeved on the twisted steel wire bundle and used for protecting the twisted steel wire bundle. The suppression structure is installed on the protective sleeve and extends along the length of the protective sleeve, the suppression structure is of a sine wave structure, the amplitude a of the sine wave structure is 0.03D-0.09 D, the wavelength lambda of the sine wave structure is 2.27-6.00 D, Dz of the sine wave structure is D-2. Asin (2pi z/lambda), a is the amplitude of waves, lambda is the wavelength of the waves, D is the average diameter, z is the distance from the average diameter position, and Dz is the diameter at the z position. According to the stay cable for restraining galloping of the dry cable, generation of large-amplitude ga