中国东部的ＮＷ向断裂，前人已作过大量研究，但对安徽境内新生代以来有育的ＮＷ向断裂研究较少。作者根据遥感解译资料，结合第四纪地质与地貌特征及地质构造现象以及近代地震资料，阐明了ＮＷ向断裂的基本特征。揭示了ＮＷ向断裂活动时代新、活动性强、切割深，以左行平移为主，并对现代水系分布和新生代火山活动具有明显控制等特点。进行探讨了其成因机制。 The NW trending faults in eastern China have been studied extensively by the predecessors, but there are few researches on the NW trending faults that have been educated since Cenozoic in Anhui Province. Based on the interpretation of remote sensing data, combined with Quaternary geological and geomorphological features and geological tectonic phenomena and modern seismic data, the author clarifies the basic characteristics of the NW fault. Reveals that the NW-trending fault activity was new, highly motivated, deep-cut, dominated by left-lateral translation, and has obvious control over modern water system distribution and Cenozoic volcanic activity. To explore its cause mechanism.