In seismic exploration,the process of acquisition records the continuous wavefield which is generated by thesource.In order to restore the seismic data correctly,the acquisition should satisfy the Nyquist/Shannon sampling theorem,i.e.,the sampling frequency should be at least twice of the maximum frequency of original signal.In seismic acquisition,because of the influence of obstacles at land surface,rivers,bad receivers,noise,acquisition aperture,restriction of topography and investment,the obtained data usually does not satisfy the sampling theorem.A direct effect of the limitations of acquisition is the sub-sampled data will generate aliasing in the frequency domain;therefore,it may affect the subsequent processing such as filtering,de-noising,AVO (amplitude versus offset) analysis,multiple eliminating and migration imaging [1-5].