Abstract: In seismic data processing, residual correction still remains after static correction and normal moveout (NMO) of CMP gathers, which greatly affects stack imaging. Traditional algorithm of residual correction is based on the cross correlation algorithm for statistics. An amplitude absolute error algorithm for residual correction is designed in this paper and MATLAB progressing is applied to undertake simulation tests and seismic data processing. Two algorithms are both effective and the amplitude absolute error algorithm is faster.