This paper presented a wind tunnel experimental study on the wind-induced response characteristics of a rectangular-sectioned arch-shaped inclined steel bridge tower during the construction free-standing stage. A 1:50 scaled aeroelastic model was employed to conduct experiments at different wind yaw angles β (0°?180°). The experimental results indicate: ① under the uniform flow field, the tower in its free-standing state does not experience galloping when the bridge’s wind speed reaches 60 m/s; ② under the uniform flow field, the tower exhibits bending vortex-induced vibrations (VIVs) along the bridge direction or transverse to the bridge direction. However, the amplitudes of the tower top displacements associated with these VIVs are relatively small, thereby posing minimal adverse effects on the comfort of construction personnel and the safety of construction machinery; ③ under the turbulent flow field, the tower only exhibits a low-speed bending VIV transverse to the bridge direction at a wind yaw angle of 75°. Compared to those of the uniform flow field, the amplitudes of the tower top displacements associated with the VIV are lower, indicating a suppressing effect of turbulence on VIVs. These research findings provide an essential reference for the design and construction of arch-shaped inclined steel bridge towers.