Northeast China is located in the superposition of Paleo- Asian Ocean and Paleo- Pacific tectonic domains with complex geo- history and frequent magmatic and tectonic activities. In this contribution, we selected two Jurassic plutons of Dongning and Fudong in the Yanbian to study their petrogenesis and metallogenetic potentiality. Dongning granite is characterized by high SiO2 and low MgO contents with enrichment in LILEs and LREEs and depletion in HFSEs and HREEs. This nature,combined with depleted Hf isotopic composition ( ε Hf(198. 6 Ma)=+1. 0~+6. 0) and high zircon saturation temperature (796~902℃), show that it formed by reworking of the lower crustal material.Fudong bitotite quartz diorite (173. 6±2. 8 Ma) possesses different Hf isotopic composition from its mafic microgranular enclaves (MMEs) (173. 8±7. 4 Ma), indicating that the Fudong pluton formed by magmatic mixing of mantle- and crust- derived magmas. The formation of the Dongning and Fudong plutons are related to the subduction of Paleo- Pacific plate beneath eastern Eurasian continental margin, which represent the crustal re- melting and accretion, respectively. Compared with the giant porphyry deposits in the Central Asian Orogenic Belt, rocks in the Yanbian area generally possess low zircon Ce4+/Ce3 ratios, which indicates that low oxygen fugacity may not favor large- scale mineralization in this area.