The mooring system of floating offshore wind power structures is a key component ensuring their long-term stable operation. In recent years， to enhance mooring performance and reduce construction and maintenance costs， optimized mooring system designs incorporating auxiliary buoys have attracted widespread attention. Based on a comprehensive review of related studies both domestically and internationally， this paper focuses on the dynamic response characteristics of buoys under ocean current effects. A series of current-induced load experiments were conducted in a circulating water channel using a 1∶25 scale buoy model. The pitch angle of the buoy and the mooring line tension were measured under different current velocities， and the variation law of the current load coefficient with current velocity was analyzed. The experimental results indicate that the buoy exhibits significant current-induced vibrations at high current speeds. The mooring tension shows a continuous increase in the horizontal direction， while in the vertical direction， the tension demonstrates non-monotonic variation due to vibration effects. The obtained dimensionless current load coefficient ranges from 1.056 to 1.538. These results provide essential parameters for the design of buoys in floating wind turbine mooring systems， thereby improving their safety and cost-effectiveness.