Abstract:Yu wavelet is a new wavelet that was designed by Professor Yu Shoupeng. It is characterized by narrow main lobe,low side-lobe amplitude,simple waveform,smooth and continuous amplitude spectrum,and so on;so it is a satisfactory wavelet in present high resolution processing. Its construction and characteristics are reviewed in brief ; and its applications in seismic data processing are summarized as follows:.Yu wavelet,the expected output of wavelet deconvolution,may improve deconvolution effect.·The peak frequency of Yu wavelet is adjustable,and its filtering effect is better than that of bandpass filtering..Yu wavelet with peak frequency ameliorates the accuracy of velocity analysis..Yu wavelet may be used to improve the fidelity of synthetic seismogram.·Three practical methods for analysing Yu wavelet parameters are recommended here to facilitate the use of Yu wavelet.It is shown in practice that Yu wavelet has brought good application effect in real data processing.