The method uses three parameters of seismic wave field attributes : the emerged angle α of zero-offset ray emerging to surface, wavefront curvature radiuses of Normal wave emerging to surface and Normal Incidence Point(NIP) wave to describe relationship between reflector and travel time. 该法利用出射到地表的零炮检距射线的出射角α、出射到地表的Normal波和NormalIncidencePoint波的波前曲率半径三个地震波场属性参数描述反射界面与走时的关系。