Abstract: A general review of the structural framework of the fold-fault zone in Majiatan is presented and the morphology of a single fold is analyzod to show the striking feature of the zone produced by torsional stress that had its origin in the rotational movement occurring in the Shanganning basin and its environs.The existence of such a movement is verified by the structural features in the zone and further confirmed by the diversified structural phenomena along the margin of the basin,including anticlines formed of wrenched faults;folds en echelon produced by torsional stress,particularly those occurring near the terminations of faults;and horizontal drag folds All of them can hold oil