Based on the discrete stiffness method, aero-elastic model for the typical transmission tower with narrow base (TTNB) was firstly made. Then the displacements and accelerations of the TTNB under various heights and wind directions were investigated through boundary layer wind tunnel tests. Finally, based on the wind tunnel test data, the wind-induced vibration coefficients of TTNB were calculated and compared with Chinese architectural structure load standards. The results showed that the mean displacements on the TTNB were mostly in the along-wind direction; but, the along-wind and across-wind fluctuating displacements and accelerations were in the same order of magnitude and cannot be ignored. Moreover, the fluctuating responses did not change remarkably with the variation of wind directions; however, the heights above ground had different influence on fluctuating displacements and accelerations. In addition, since the high-order modes had influence on the dynamic displacement responses, the wind-induced vibration coefficients which were only deduced from the first-order displacement response would be lower. And the wind-induced vibration coefficients obtained from Chinese architectural structure load standards were bigger than that from the wind tunnel tests.