Determination of zircon U Pb isotopic date and Lu Hf isotopic composition of various granitoids in the Qitianling plutons,south China show, there are two staged granites: the earlier hornblende granitite with 160.0 SymbolqB@ 2.7 Ma of zircon U Pb concordant age and the later granitite with 156.5 SymbolqB@ 1.8 Ma of zircon U Pb concordant age.Metamietimation of zircons appear in the later mineralizing granitite, those zircon is intensively riched in LREE, U and Th, and characteristics of hydrothermal zircon. Lu Hf isotopic compositions of zircons from four granites show that diagenetic substance are derived from the lower crust, which original magmas were resulted from partial melting of the lower crust in the palaeo Proterzoic（1.3～1.5 Ga）, with some mantle substance adding. He Ar isotopic compositions for fluid inclusions of pyrite and garnet from the Qitianling Furong tin deposit also show a lower ratio of 3He/4He（0.059~0.432）, which ranges from those between the crust and mantle, suggests mantle fluids are involved in mineralization for the deposit (less than 10% for the amount).