Although several geotectonic models concerning the formation and exhumation of ultrahigh - pressure rocks have been proposed, the mechanism for exhumation of high-and ultrahigh-pres-sure rocks is still a focus in the investigation of continental erogenic dynamics. The authors have studied a crustal-scale extensional ductile shear zone lying on the northern and northwestern margins of the northern Jiangsu and southeastern Shandong metamorphic terrain. On the basis of studies of the geometry, kinematics, deformational environment and the time of deformation, The authors have found that the extensional tectonic deformation oblique to the trend of the entire high-and ultrahigh-pressure metamorphic belt is responsible for the exhumation of high-and ultrahigh-pressure rocks from the middle crust in northern Jiangsu and southeastern Shandong.