通过地震剖面、地形－地貌、断裂构造、地壳结构、中新生代沉积盆地、第四纪地质特征等分析，认为南海北部陆缘存在滨岸岛键、陆坡北缘和陆坡南缘三条反“S”型构造带。它们形成于晚第三纪，较“新华夏系”和“南海系”晚。反“S”型构造带新生代晚期的活动方式，对南海北部陆缘的地质演化影响显著，同时控制了这一区域的灾害性地质因素的活动方式和分布。 Based on the analysis of seismic profiles, topography, geomorphology, fault structure, crustal structure, Mesozoic-Cenozoic sedimentary basin and Quaternary geological characteristics, it is concluded that there are three shoreline anti-S “Type structure belt. They formed in the late Tertiary, than the ”New China Series“ and ”South China Sea“ late. The late-Cenozoic activity pattern of the reverse ”S" tectonic belt had a significant effect on the geological evolution of the northern continental margin of the South China Sea, and at the same time it controlled the activities and distribution of disastrous geological factors in this area.