Based on the NCEP/NCAR daily reanalysis data from 1958 to 2008,this paper studies the subtropical high indexes in the winter of 2007/2008(a serious cold rain-snow frost disaster occurred in southern China),El Nino/La Nina events average,and 50-yr average(from 1958 to 2007).Then,the cross wavelet and wavelet coherence techniques are introduced to analyse the relativity and the difference of subtropical high indexes,and the influence of subtropical high on atmospheric circulation in different periods including the El Nino/La Nina periods and the usual years.Some meaning characters of subtropical high activity and corresponding subtropical circulation are revealed in the winter of 2007/2008,such as the position of subtropical high moves northward in the winter of La Nina event average,especially in the winter of mean-strong La Nina event.