This paper applies wavelet analysis techniques to study the temporal frequency structure of He'nan Province rainfall(R),sea surface temperature(T_SS)and Southern Oscillation Index(I_SO)series.Marr wavelet transform is first used to analyze each time series,and the bivariate wavelet analysis then to investigate the correlation of ΔR with ΔT_SS and ΔI_SO.Results show that the correlation between He’nan precipitation and ENSO on the time scales of 2-4 years and 5-7 years are apparent.