Wind load and wind-induced vibrations of stay cables are of great concern in engineering design and wind resistance research fields. Therefore，it is necessary to explore a new type of stay cable with less aerodynamic force and excellent wind-resistant performance. To this end，a wavy stay cable was employed to study the overall aerodynamic forces，wind pressure distribution，local forces，vortex-induced vibration and dry galloping characteristics，based on a wind tunnel test. The test results indicate that，during the Reynolds number range of 1.00×105~ 3.86×105，mean drag coefficients of the wavy stay cable are generally less than those of regular stay cables，with a maximum reduction of 18% in low Reynolds numbers. The maximum mean lift coefficients are decreased by around 80%. Variation in wind pressure distribution and aerodynamic forces with the Reynolds number is almost identical to those of regular stay cables，except for weaker spanwise correlation. The vortex-induced vibration is significantly suppressed by the wavy stay cable，whose maximum amplitude is decreased by 34% and the corresponding velocity is increased by 16%. However，dry galloping is nearly the same as regular stay cables，whose maximum amplitude is decreased by 5% and sustained wind velocity range is wider.