Abstract: The southeastern (SE) margin of the Qinghai-Tibet Plateau is jointly affected by the northeastward pushing of the Indian plate, the southeastward extrusion of the plateau material, and the blocking of the Sichuan Basin and South China Block, which has become a key channel of the southeastward escaping material of the Qinghai-Tibet Plateau. In this paper, we summarizes the results of seismic anisotropy of different depths obtained by different seismic phases and different methods in the SE margin of the Qinghai-Tibet Plateau. Combining the distribution of faults, surface movement, tectonic stress and deep structure in the region, we comprehensively analyzed the medium anisotropy and deformation coupling characteristics from the upper crust to the middle-to-lower crust and upper mantle. The difference in seismic anisotropy of the crust and the upper mantle in the SE margin of the Qinghai-Tibet Plateau reflects the complex deep structure as well as crust and upper mantle deformation in this region. As scientific issues such as the formation mechanism of the Qinghai-Tibet Plateau, the coupling state of crust and mantle and the distribution of weak layers are still under academic discussion, it is beneficial to obtain more accurate and detailed seismic anisotropy images of crust and upper mantle by effectively combining different data and synthesizing various methods, thereby providing more effective constraints on the research of deep material movement and dynamic model.

Key words: Southeastern margin of the Qinghai-Tibet Plateau, Seismic anisotropy, Body wave, Surface wave, Deep tectonics