Noble gases isotopic compositions of fluid inclusions in major rock-forming minerals in HP-UHP metamorphic rocks collected from the Chinese Continental Scientific Drilling (CCSD) were analysed by using a high vacuum gas mass spectrum. The results show that the ~ 3 He/ ~ 4 He ratios are (0.004~0.775) 10~ -6 , and the corresponding R/R_a are 0.003~0.553; The ~ 40 Ar/ ~ 36 Ar ratios are 316.2~11358.8, much higher than that of the air (295.5). ~ 20 Ne/ ~ 22 N and ~ 21 Ne/ ~ 22 Ne are 9.47~12.4 and 0.026~0.051 respectively, and the respective ~ 134 Xe/ ~ 132 Xe and ~ 136 Xe/ ~ 132 Xe are 0.376~0.484 and 0.324~0.416, all higher than their corresponding values of the air. He-Ar, Ne and Xe isotopic compositions suggest that the ore-forming fluid of the fluid inclusions in the CCSD HP-UHP rocks were composed mainly of crustal fluid and a little air-saturated water, while the mantle-derived fluid was nearly absent. In the fluid inclusions, the He derived predominantly from the crust, the Ar are composed mainly of crustal radiogenic ~ 40 Ar and about one third air Ar. A little amount of Ne and Xe might derive from the mantle. The characteristics of F~ 40 Ar