Using the HadISST and NCEP/NCAR reanalysis data,a diagnosis and analysis was carried out for the abnormal temperature over eastern China(EC) during El Niño events in the following summer beginning from 1949.The results show that,in the summer after EP+CP El Niño,the negative temperature anomaly appeared in the Shandong-Huaihe Basin and along the coast of southern China,while the other areas showed positive anomaly.The EP El Niño,EC showed negative anomaly throughout,and the range in the north was greater than that to the south of the Yangtze River.For the CP El Niño,the temperature throughout the north was down more than that in the south of the Yangtze River.The corresponding atmospheric circulation analyses indicated that,in the summer after the three types of El Niño events,the anomalous zonal vertical circulation of the equatorial region(5°S-5°N) was shown to appear as three circles,but their anomolies not only had differences in strength,the latitude ranges were also different.In the summer after EP+CP El Niño events or EP El Niño events,there were two abnormal Walker circulations in the equatorial Pacific,while in the summer following CP El Niño events there were two Walker circulation anomalies in the equatorial India Ocean.The intensity and range of the subtropical high in the Western Pacific Ocean at 500 hPa was one of the main reasons for the difference of temperature distribution in EC during the summer after the three types of El Niño events.In the summer following EP+CP El Niño events,the 500 hPa geopotential height anomaly showed "sandwich" type distribution over eastern China.The eastern part of northeast China,the Shandong Peninsula and southern China area were positive anomalies,while the other regions were reduced to some extent,and the negative anomaly amplitude decreased from north to south.In the summer after EP El Niño events,the 500 hPa geopotential height had different degrees of reduction over EC,the meridional circulation was strengthened,which was conducive to the cold air travelling southward,thus the temperature was significantly lower than normal,the intensity of the subtropical high in the Western Pacific was weakened,its coverage decreased,and there was a certain degree of negative temperature anomaly in southern China.In the summer after CP El Niño events,the meridional circulation was relatively strong at the 500 hPa geopotential height over EC,which was conducive to the cold air travelling southward to the north of the Yangtze River region,the temperature was low in the north,the West Pacific subtropical high travelled southward,with a rather flat shape,the effect range of the subtropical high increased and its strength increased slightly,and the effect of the subtropical high on southern China strengthened,so that the temperature in southern China increased.However,the effect of the subtropical high to the north of the Yangtze River weakened and caused the temperature there to drop;the transportation of the southwest warm and humid air at 850 hPa also had a significant effect on this.