Correlation analyses between the wind stress anomalies in the Kuroshio region and the Nino3 SST index series of nearly 50 years show that the "key period" when ENSO affects the meridional wind stress anomalies in the Kuroshio region is autumn/winter to next spring,and that for the zonal wind stress anomalies is winter to next spring.The results of extended SVD analyses between wind stress anomalies and SSTA,and composite analyses reveal the evolution of structure of wind stress anomalies in the Kuroshio region during ENSO.In the autumn of ENSO year,the southern wind stress anomalies appear first over the East Sea and Ryukyu gunto,and the southeast wind stress strengthens at the north of Luzon and the east of Taiwan in winter.The range and intensity of anomalies become maximum in the next February,and then weaken rapidly and disappear in the next May.The range and the intensity of meridional wind stress anomalies affected by the SSTA are even more larger and stronger respectively.