Relationship between summer rainfall in the Changjiang-Huaihe valley and previous winter (DJF) circulation,SSTA is investigated,in terms of the NCEP/NCAR reanalysis data,the SST (sea surface temperature) data reorganized by British Meteorological Department,and the 160 station monthly precipitation data from NCC (China National Center of Climate).Then sensitive experiments to SSTA are conducted with the NCAR CCM3 model.Results show that the summer rainfall is closely related to the circulation anomalies at high latitudes over Asian,which are related with the winter SSTA of Northwest Pacific.As the SSTA of Northwest Pacific in winter is higher than normal,the positive height anomaly will occur over the area from Ural Mountains to the Okhotsk Sea,the weakly negative one over Asian mid latitudes in next summer.Therefore,more than normal blocking highs over Asian at high latitudes and troughs at lower-mid latitudes will be helpful for cold air and warm air to meet over the Changjiang-Huaihe River valley,producing positive rainfall anomalies;and vice versa.