The Jiulongnao granitic intrusion is located in southern Jiangxi Province of the East Nanling area, and consists of granitoids of four periods. There are a lot of tungsten, tin and lead-zinc deposits around this intrusion. Buried granites of the Taoxikeng quartz-vein tungsten deposit and the Baoshan skarn deposit were chosen to compared with the Jiulongnao granite. Zircon SHRIMP U-Pb dating gives the ages of 158.7±3.9Ma for the Taoxikeng granite, 157.7±2.7Ma for the Baoshan granite, 154.9±2.2Ma for the Jiulongnao granite, indicating that the Yingqian pluton is the Late-Jurassic magmatic intrusions. The SiO2 contents are 69.67% ~ 76.99%, Al2O3 content are 12.41% ~ 14.32%, A/CNK is 1.00 ~ 1.37, so all of the rocks fall into meta- to weak peraluminous and high-K calc-alkaline category, thereinto TiO2, CaO, TFe2O3, FeO, LOI contents of the Baoshan granitoids are higher than others. The whole rock trace elements of the Baoshan granite demonstrate total LREE enrichment without significant Eu anomalies and obvious fractionation between LREE and HREE. The REE of the Jiulongnao granite have “tetrad effect”. The εNd(t) and T2DM values of the Jiulongnao, Taoxikeng and Baoshan granites are from -10.5 ~ -9.1, -10.6 ~ -10.2 to -9.4 ~ -8.6 and from 1.84Ga ~ 1.63Ga, 1.78Ga ~ 1.74Ga to 1.61Ga ~ 1.54Ga respectively. Above values are below to those of foundation base (2.2Ga ~ 1.8Ga) in Cathaysian Block and that of typical S-type granites (1.8Ga) in South China. These data indicate that three intrusions were result of partial melting of ancient Proterozoic crustal materials, interacted with mantle-derived magmas. The Late-Jurassic magmatism formed in a continental crustal extension and thinning setting, which is a favorable event to interaction with crustal and mantle.