Tengchong volcano area,as one of the large Cenozoic volcanic groups in China,has drawn significant attention due to its crustal magmatic activity. To investigate the deep structural characteristics of the Tengchong volcanic region,we analyzed over 600 three-component seismic datasets from 11 permanent and one temporary station as part of ChinArray Phase I,covering the coordinates(24°40'～25°30'N,98°15'～98°45'E). The time-domain P-wave receiver function was extracted,and crustal anisotropy parameters were calculated using the Pms wave split time variance minimization method. To mitigate the impact of sedimentary layers on the receiver function,a reverberation removal filter was applied. Using the H-κ-c method,which is effective for anisotropic crustal media,we calculated crustal thickness, v_P/v_S ratios,and Poisson ratio. The results indicate that the anisotropic slow wave delay ranges from 0.1s to 0.5s seconds,with an average delay of 0.27s. The crustal anisotropy in the Tengchong volcanic region likely originates from the middle to upper crust. The polarization direction of the fast wave predominantly aligns with the NE-SW and N-S directions,corresponding to the orientation of the major faults and maximum compressive stress in the region. Crustal thickness varies between 35.5 and 39.5km, v_P/v_S ratios range from 1.71 to 1.9,and Poisson ratio lies between 0.24 and 0.308. Notably,the region exhibits high Poisson ratio values,suggesting possible magmatic chambers beneath the TNC-SBT and MZT-MIZ areas,which show the highest Poisson ratios. For regions with significant geothermal activity,such as RHT and RST,the thermal energy appears to be sourced horizontally from adjacent areas-east of RHT and northeast and west of RST. The variations in Poisson ratio across different stations in the Tengchong volcanic region are likely influenced by the presence of magma chambers in the crust and ongoing volcanic activity. These findings provide important insights into the complex magmatic processes and the deep structure of the Tengchong volcanic region.