Abstract: 281 samples, collected from the NS93-5 drilling core located in the Nansha area of South China Sea, were used to study magnetic characteristics of sediments in the Sea. Detailed rock magnetic results show that the magnetic minerals of sediments were dominated by ferrimagnetic minerals such as magnetite, but the small contribution of hematite and maghematite also existed. The sediments recorded three negative values of inclination in 191~206, 232~248 and 292~308 cm. The corresponding age of these negative values are 65.87~68.7, 73.4~80.8 and 108.4~113.6 kaBP according to stratigraphy of oxygen isotope, ¹⁴C and the age of volcano. The negative value during 108.4~113.6 kaBP may be the record of Blake event in the sediments of Nansha area.