Xianxia rock is mass rocks that are obviously controlled by the NE tectonic in Zhejiang and Anhui, with complicated lithology content mainly composed of early medium grain monzogranite porphyritic monzogranite and late medium coarsegrain，fine grained syenogranite, and later intrusded by a large number of vein rocks, such as fine crystal rock, quartz syenite, diorite, andesite, diabase，etc．Zircon UPb age data indicate that early monzogranite emplaced about in 1451~1442Ma，late syenogranite emplaced about in 1317~1308Ma，the late diabase dikes emplaced in 1283Ma. Both periods rocks belong to highly fractionated Itype granitoids, with the characterictic of high SiO2and low P2O5; early monzogranite belongs to the metaluminous, highk calc alkaline series, with the characteristic of strong right tendency REE curve, moderate negative Eu anomalies, enrichment of Rb， Th， U， K，and depletion of Ba, Nb，Sr，P，Ti，etc; late syenogranite belongs to metaluminousaluminum, shoshonitic series, with the characteristic of weak right tendency REE curve, strong negative Eu anomalies, enrichment of Rb， Th， U， K，and strong depletion of Sr，P，Ti，etc. Both rocks show relatively high（86Sr/87Sr）ivalue （0.70807~0.70988） and epsilon Nd（t） values （-8.87~-5.14），two stage Nd model age is between 1.36~1.65 Ga．The Early Cretaceous Diagenesis in Zhejiang and Anhui may be related to the changing of the Pacific plate subduction angle， a tectonic background changing from MiddleLate Jurassic（165±5~145±5Ma）compressive environment into earlyearly Cretaceous （145±5~125Ma） extensive environment, resulting in a highdegree crystallization and differentiation the two stage magma which formed by the partial melting of the ancient Jiangnan orogenic belt crustal and may be contaminatedly the Yangtze lithospheric mantle materials.