Based on the correlation and SVD methods, the relationship between the summer rainfall in Changjiang River basin and the SSTA of different seasons are studied. The results show that if the SSTA of EEP in winter and that of TWP and EI in summer is warmer than normal, the tropic monsoon will become weaker, and the subtropic monsoon will become stronger. The cold and warm airflow will converge in the Changjiang River basin and the Mei-yu front will be strengthend, then the rainfall of summer in Changjiang River will be much more than average.