Abstract: In this paper,preliminary studies are decribed on the kinetic and dynamic characters of PS converted seismic waves of local and near earthquakes,and the main criteria for identifying PS converted seismic waves of near earthquakes are also suggested. The data of PS converted seismic waves at some observation points in the Xingtai area are analysed based on these criteria. The main deep discontinuities thus derived are essentially consistent with those determined by deep seismic sounding surveys.It is concluded that the PS converted seismic wave method is an effective method for the exploration of regional structures of the crust.