Abstract: In the paper,the relationship between E1Nino and rainfall during the flood season in China is discussed.when the east-pattern of El Nino,the structure of three major positive/negative S3T departure regions in Northern Pacific are very similar to the PNA-pattern,and the rainfall during the flood season is less than normal in Changjiang River Valley and is more than normal in north China and south of Changjiang Valley.When the middle-uattern of El Nino.the three maior positive/negative SST departure regions are distributed over the line from the Equatorial Eastern Pacific to Kurile Islands,and the rainfall during the flood season is more than normal in Changjiang Valley and is less than normal in north China and south of Changjiang Valley.