Abstract:The method for plane wave prestack depth migration using the maximum energy part of source wavefield is presented in the paper. This method has the advantage of plane wave migration. The maximum energy part of wavefield of plane wave source is estimated by making continuations of both source wavefield sparsely sampled in frequency domain and travel time of the maximum energy,so that efficiency of plane wave prestack depth migration is improved significantly. The imaging of maximum energy part of source wavefield also ensures imaging accuracy. The trial result of Marmousi model shows that in the case of complicated geological'structure,the processing result of the method may he as good as the result obtained by prestack depth migration of full wavefield plane wave.