Abstract: By using the methods of EOF, SVD, correlation and composite analysis, the relationship between Pacific SSTA pattern and rainfall in the middle and lower reaches of the Yangtze River is investigated. Results suggest that SSTA from northwestern Pacific to southeastern Pacific maintains the pattern of "+ - + -" from the previous autumn to the subsequent summer, bearing a close relation to the EAP. The Pacific SSTA in the previous winter and spring led to the remarkable convection anomalies in low latitudes, which thereby resulted in the anomalous western Pacific Subtropical High and the rainfall in the Yangtze River Basin. Numerical simulations further confirm that rainfall in the middle and lower reaches of the Yangtze River is not only related to the tropical SSTA but also to the SSTA in the mid-latitude Pacific.