Study for impact of ENSO and warm pool of western pacific on Asian monsoon and climate of China is one of the important problems related to prediction of short term chlimate change in China in this paper diagnostic study for the above problems has been done using the observed data especially their comparitive importance of ENSO and warm pool of western Pacific. The results show that influence of ENSO and warm pool in eastern Asian monsoon circulation is statictically significant at the 95% level, however their variance contribution to total variance of rainfall season along thd middle down stream of Yangtz river valley doesn’texceed 30%.