The Xiangshan volcanic basin comprises volcano intrusive complexes that are composed of tuff, rhyolite dacite, porphyry rhyolitic dacite, porphyroclastic lava, coarse grained porphyry and porphyritic granite. The paper discussed the origin and evolution of these igneous rocks based on their whole rock major and trace elements, as well as Pb Sr Nd isotopes. Different lithologies have similar elemental and isotopic compositoins, indicating that they were derived from the same source region. The rocks are rich in silicon and alkali, low in calcium and magnesium. LREE and HREE differentiate significantly, REE distribution curve presents four component model and obvious negative Eu. Nd model ages(T2DM) of rhyodacite, Porphyroclastic Lava, rough spots granite porphyry and porphyritic granite is closer, respectively 167Ga, 166Ga, 166Ga and 163Ga, slightly lower than the residual zircon 207Pb/206Pb age (17879Ma) and the the oldest rocks exposed (amphibolite) of Cathaysian Block within the magmatic zircon SHRIMP U Pb age of (1766 ± 19Ma). There is a negative correlation between SiO2 and P2O5, combining the facieology and the two element mixed mode petrography of Sr Nd, calculating that the material source of the complexes has a small amount of mantle source involved, the average content of 2282%.; each sub cycle between the different rock types with diagenesis sequence, Na2O and K2O increased, but SiO2 content decreased gradually, may indicate that the magma has occurred in the differentiation of normal. acidic component is on the upside, and the partial distribution of basic components at the bottom, at the end of the first sub cycle or timeout period, acidic component join in the magma. The first subcycle variation degree is strong, the separation of plagioclase and potash feldspar, at the second sub cycles, mainly potassium feldspar. At the late Yanshan, Jiangxi in the dynamic background of the earth is different, gradually evolved into intra plate rift trend from south to north. In 141Ma~132Ma the Xiangshan area is post orogenicr, in the vicinity of 125Ma gradually evolved into an intraplate rift environment.