Abstract: The collision and compression between the India and Eurasia plates can not generate all the tectonic features of Tibetan Plateau and the uplift of Kunlun,Tianshan and great depression of Tarim and other basins.We have to seek an other geodynamic mechanism to clarify the continental dynamic process.The stress field induced by mantle convection beneath Tibetan Plateau and its adjacent areas is calculated by using the Bouguer gravity anomalies based on an improved Runcorn's scheme.The stress divergent zones,corresponding upwellings of mantle flow,are located beneath central and northern Tibetan Plateau and Tianshan,while convergent ones,downwellings,under Tarim,Qaidam and Sichuan basins.