The NW-trending tectonic belts in the world are called Tethyan gigantic linear tectonics. The NW-trending structures along Poluokenu Qilian Mountains Qinling are well developed, making up an important set of ore-controlling structures. Based on 1:200 000 regional gravity survey in northwestern Hebei, this paper has discussed the geophysical (gravity field and magnetic field) evidence and its role in locating important mineral resources. Among the faulted structures, Kangbao Chicheng Miyun rift is the best ore-forming zone for lead, zinc and silver deposits, Zhangbei Zhangjiakou Huailai Changping rift is an active earthquake zone, and Wanquanyulingou Zhuoludaolazui rift may be an important boundary of geotectonic units.