本文用重力资料反演计算了测区莫霍面埋深,试分析了影响莫霍面埋深及其展布形态的深部因素,并以莫霍面等埋深图为依据,结合重磁水深图探讨了南海地壳结构及深部构造,发现与相邻边缘海和大洋相比,南海具有莫霍面埋深浅,布格重力异常值低的特点,究其原因可能与南海复杂的构造活动和低密度地幔的存在有关。 In this paper, the depth of Moho was measured by gravity data inversion. The deep factors that affect the depth of Moho and its distribution were analyzed. Based on the depth map of Moho and the depth of Moho, The map explores the crustal structure and deep structure of the South China Sea. It is found that the South China Sea is characterized by shallow depth of Moho and low Bwugular gravity anomaly compared with the adjacent marginal sea and ocean, which may be related to the complex tectonic activity in the South China Sea and low Density of the existence of the mantle.