[Purposes] The paper aims to investigate differences in the buffeting characteristics and their influencing factors of curved cable-stayed bridges and straight bridges. [Methods] Taking a scenic curved cable-stayed bridge in Xiamen as the research object, this paper built its finite element model with ANSYS and analyzed its dynamic characteristics. The fluctuating wind field of the bridge was simulated with harmonic synthesis, and its aerodynamic three-component force coefficients were obtained by wind tunnel tests. Based on the fluctuating wind field of the bridge, the study calculated its buffeting force, which was then applied to the finite element model to analyze buffeting displacement under the influences of aerodynamic admittance and self-excited aerodynamic force. [Findings] The displacement of main girder in every direction decreases when aerodynamic admittance is considered. The vertical displacement and torsional displacement increase, while lateral displacement decreases when self-excited aerodynamic force is considered. [Conclusions] The results can provide theoretical reference for buffeting response calculation of curved cable-stayed bridges.