处于低纬度的华南发育了大量的花岗岩和火山岩 ,其磁场特征不同于其他地区。本文用三维解析信号技术对华南航磁异常进行了处理 ,以探索在不同地质背景地区的解析信号技术的应用效果。根据解析信号的强弱 ,对华南磁场进行了分区 ,并结合地震和华南花岗岩同位素地球化学的研究成果探讨了磁场分区的深部地质背景。 In southern China at low latitudes, a large number of granites and volcanic rocks are developed, whose magnetic field characteristics are different from those of other regions. In this paper, the aeronautical anomalies in South China were processed by three-dimensional analytic signal technique to explore the application effects of analytic signals in different geological backgrounds. Based on the analysis of the signal strength, the magnetic field in South China is zoned, and the deep geological background of the magnetic field division is discussed based on the research results of earthquakes and isotopic geochemistry of granites in South China.