Abstract: Located in the southeast of Nanyang sag,the tectonic setting of Baiqiu region is a complicated nose-like structure cut by a late northeastern fault.The underground structure of this region is complex,with faults development.As the formation is of intersection cutting by multiphase faults,the inside structure is very complicated.At the same time,due to the bigger buried depth,by use of the conventional seismic processing,the formation imaging accuracy of this region can not be obtained.While with prestack depth migration technology applied in Baiqiu region,the precision of the formation imaging has been improved and the minor fault block has been accurately described,which therefore meets the demands of the interpretation for geological personnel.