Abstract：A new method for prestack coherent noise elimination is put forward here. In the method，whole seismic record is taken as an unit in time-space domain;coherent noise is identified by computer，without windowing of seismic record;filtered part mainly lies in the area where there exist noises，and other parts are not influenced at all;no false event appears and filtering effect is only in partial area. Processing results of synthetic and real. seismic data say that the method is very effective because it suppresses coherent noise as much as possible，without damage of effective signals in all frequency bands.
