Abstract: The studied area is 24.2°—25.2°N,97.5°—98.5°E.The studied five digital seismic stations distributed in the both sides of the Dayingjiang fault in the studied area.The S-wave velocity structures within the depth of 0—100 km beneath five stations are inversed from the broadband teleseismic P waveforms by receiver function.The results show:In the northwest side of the Dayingjiang fault,the depth of Moho is about 38 km,and in the southeast side,the depth of Moho is 40—42 km.The S-wave velocity structures of the crust and upper mantle differ obviously in the both sides of the fault.In the southeast side,there are lower velocity zones in both crust and upper mantle beneath the stations;but in the northwest side,there are lower velocity zones only in the crust beneath the stations.In the studied area,the S-wave velocity structures shows strong horizontal heterogeneity.