The Funiu tectonic belt contains many shear zones in which syntectonic quartz veins are well developed. Mineral component of veins are mainly quartz and there are many fluid inclusions and gas liquid inclusion inclusions in them. The composition of inclusions is characteristic by medium to high salinity, low CO2, low δ18O~δD and a small amount of organic matter and with homogenization temperature of 170.6 ~ 337.8 ℃ and pressure of 0.27~0.87 GPa calculated by muscovite geobarometer. The result shows the metamorphic fluid component and isotopes are inherited from original rocks formed in submarine volcanic eruptions environment. The metamorphism of the Funiushan tectonic belt belongs to greenschist facies and the high pressure suggests the tectonic setting is a subduction zone. The characters of fluid inclusions reflected the Kuanping rock block and the Erlangping rock block subducted beneath the North China Plate in turn and generated strong deformation and weak metamorphism.