The Wanbaogou Pluton, located in the southern margin of the Qaidam Basin, contains porphyro-texture quartz monzonite, rapakivi-textured monzogranite and medium grained monzogranite as well as mafic magmatic enclaves. Zircon SHRIMP U-Pb dating for the rapakivi-textured monzogranite shows some features of A-type granite. The ε_Hf(t) and tDM2 of the granite change from-1.1 to 10.5 and 744 Ma to 1 490 Ma, respectively, suggesting mult-sources for the granitoids. The large ε_Hf(t) (ca.10) values and young tDM2 (744 Ma) indicate juvenile component involved in the formation of the granitoids. All above features, together with the regional geology, suggest that the granitoids are in an extensional setting of post collision. The granitoids are similar to the Mesozoic rapakivi-textured granitoids of the Qinling orogen in texture and geological setting, showing that there two periods rapakivi-textured granitoids occurring in the central orogen belt in China.