Abstract: To evaluate the impact of the number of consecutive hills on the structural performance of the new transmission structure (i.e., suspension-braced transmission structure (STS)) suitable for mountainous areas, boundary layer wind tunnel tests under the influence of consecutive hills are completed at first. Based on experimental data, the variation trends of mean and fluctuating wind speed under the influence of different numbers of consecutive hills are analyzed, and formulas for calculating the mean and fluctuating wind correction coefficient are proposed. Subsequently, a nonlinear analysis method considering the influence of consecutive hills is proposed for wind-informed dynamic response (WDR) of the STS. The influence of the number of consecutive hills on the WDR of the STS located in a strain section is investigated. The main conclusions are as follows: With the number of consecutive hills increases, at the hilltop, the mean wind correction coefficient first increases and then stabilizes. At the foothill of the leeward side, the mean wind correction coefficient first increases and then decreases, while the maximum fluctuating wind correction coefficient shows a trend of first decreasing and then increasing. As for the mid span of conductors and cables supporting conductors (CSCs), both the mean and standard deviation of displacement and tension show a trend of initial decreasing, then increasing, and then gradually stabilizing with the number of consecutive hills increases. In terms of the WDR of conductors and CSCs, the number of consecutive hills have a significant impact on the mean value of the midpoint lateral displacement, with a relatively mild impact on their standard deviation, while the impact on the tension at the mid span is the opposite.