对地下某点进行多次观测的许多地震道，经过消除时差，滤去干扰波后迭加在一起，从而得到一个点的水平迭加，测线上的所有点都经过同样的处理，把一条测线处理完，迭加在一起即得到整条测线的水平迭加处理结果。-Of underground of a point of multiple observations of many seismic trace, after eliminate lag, filter the interference wave superposition together, in order to get a point of horizontal stack, measuring line all points are treated the same, the surveying line processed superimposed together to obtain the whole measuring line stacking results.