In the piedmont zone of the Saishiteng Mountains on the northern margin of Qaidam Basin, the authors conducted researches on CEMP exploration. Several methods such  as Robust, remote reference technique and static correction were adopted in data preprocessing to suppress noise and improve data quality. Through the comprehensive utilization of Bostick, CMI and 2D continuous medium inversion, the effective anomaly was detected obviously, the structural characteristics of overthrust nappe was unveiled clearly, and the spatial spread of lower wall strata around the thrust-nappe fault and the contact relation between the mountain and the basin were determined.