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Seismic coherence technique can effectively suppress the continuity and highlight the discontinuity�� which is more intuitive than those of the geological interpretation of geological slices and has more detailed interpretation on the fault�� Compared the coherence technique based on the Manhattan distance with the C1 coherence algorithm�� this technique is not only stronger than C1 coherence algorithm in fault identification capabilities��but also has the smaller time window than the C1 coherence algorithm when the two algorithms have equivalent fault information�� which can improve the speed of program and the operating efficiency of seismic coherence techniques�� The coherence technique based on the Manhattan distance can also compute the visual time angle of every path in horizontal- vertical lines approximately as the C1 coherence algorithm works��