By use of monthly summer rainfall data of 160 stations from 1951 to 2000 in China,the dry wet years have been divided,and the climatic characteristics of summer rainfall in this area have also been analyzed.The analysis of contemporary correlation and lag correlation between summer rainfall in North China and sea-ice in different sea areas of Arctic show that the correlation coefficients are remarkably negative between summer rainfall of North China and sea-ice of Hudson Bay from May to August in the same year.In addtion,sea-ice of Hudson Bay in key time interval has negative relationship with index of Asian summer monsoon,postive relationship with the western extension of subtropical high ridge in western Pacific in August,and negative relationship with the intensity of the western Pacific subtropical high in August.Westerly jet of Eastern Asia is very different in heavy/light sea-ice years.Results show that when sea-ice area of Hudson Bay is larger(smaller),Asian summer monsoon in the same year is weaker(stronger),location of the west Pacific subtropical high is eastern(western)of its mean location,intensity of subtropical is weaker(stronger),westerly jet of Eastern Asia is weaker(stronger).