广东沿海不仅是我国经济较为发达的地区 ,同时也是我国地质环境较为脆弱及各类地质灾害较为发育的一个地带。通过地质灾害案例的调查、地质灾害孕育环境、诱发因素等的研究与分析看出 ,南奥、汕头、揭阳、阳江等是历史强震和潜在地震活跃区 ,地震多发生在 NEE、NNW和 NW向活动断裂交汇部位附近。丘陵、台地及其边缘区的河流两岸、海岸、交通沿线、城镇人工切坡等构成了是水土流失、崩塌和滑坡等的多发区。降雨的时空分布直接控制着丘陵和台地不稳定斜坡出现的机率。雷州半岛的地裂缝与地下水活动密切相关 ,雨、旱季节性变化利于地裂缝的发育。岩溶塌陷是过度抽、排岩溶区地下水的结果。而地面沉降是长期超采深层承压水的反映。软土构成了沿海三角洲与滨海平原区工程建筑的非稳定地基。地质灾害的防治应采取防为主、预治结合的可持续对策与措施 Guangdong’s coastal area is not only a relatively developed economy in our country, but also a place where geo-environment in China is relatively fragile and all kinds of geological disasters are well developed. Through the investigation of geological disaster cases, the geohazards inoculation environment and the predisposing factors, it is found that Nanao, Shantou, Jieyang and Yangjiang are historical strong earthquakes and potential seismic active areas. Most earthquakes occur in NEE, NNW and NW Near the intersection of active faults. Hilly, platform and its marginal zone of the river banks, coasts, traffic along the town, artificial cut slope constitutes a soil erosion, landslides and other landslides and so on. The temporal and spatial distribution of rainfall directly controls the probability of occurrence of unstable slopes on the hills and terraces. The ground fissures in Leizhou Peninsula are closely related to groundwater activities. Seasonal changes in rain and drought are favorable to the development of ground fissures. Karst collapse is over pumping, row karst groundwater results. The ground subsidence is a reflection of long-term over-exploitation of deep confined water. Soft soil forms the unstable foundation of engineering structures in the coastal delta and coastal plain areas. Prevention and treatment of geological disasters should be taken to prevent the main, pre-treatment combination of sustainable countermeasures and measures