Abstract: In this paper, it is suggested to use the approximate ray theory (ART) to get the theoretical traveltimes of seismic waves and synthetic seismograms in laterally heterogeneous crustal model.Based upon that, a discussion on the methods and procedure of DSS data inversion in the model has been preliroinarily made.It is necessary to consider both kinematic and dynamic characteristics in the data processing.#br#The data processing of Renxian-Wuqing DSS profile has been taken as an example to illustrate the practical application of the above mcthods.