Based on the NCEP/NCAR reanalysis monthly data,by means of correlation analysis and the Mexico Hat Wavelet analysis,the variation features of rainfall in Vietnam and its relation to Pacific SSTs are studied.It is found that the precipitation mainly happens in summer and autumn;the summer and autumn precipitation has interannual and interdecadal variabilities.Further study shows that the summer rainfall in North Vietnam has a close relation with Pacific SSTs.When the summer rainfall is more(less),the SST is higher(lower)in the west Pacific Ocean and lower(higher) in the east-central Pacific.