Abstract: This paper used the ERA-5 wave dataset including the significant wave height and stokes drift from 1981 to 2020 provided by the ECMWF, and studied the wave climate in the Southern Ocean. By selecting typical ENSO events from 1981 to 2020, the distribution of significant wave height in the Southern Ocean during the typical events was compared with the distribution of 40-year mean significant wave height, and the discovered abnormal distribution was explained with the theory of wave’s large-scale effects. Furthermore, this paper analyzed anomalous distribution of stokes drift in the Southern Ocean during ENSO events, and demonstrated the relationship of wave transport from the Southern Ocean and the occurrence of ENSO events. This paper found the existence of Antarctic Circumpolar Waves (ACW) in wave fields, and the different results of EOF analysis between wind wave and swell indicated that ACW is composed of two types of signals: ACW2 and ACW3. By comparing the interannual variation trend of EOF analysis’ time series with the Niño3.4 index, the relationship between ENSO events and ACW in wave field was proposed.