Based on the monthly average OLR data, ERA5 reanalysis data and Lin Zhiqiang's ERA-Interim plateau vortex dataset of the summers from 1979 to 2019, the spatiotemporal variation characteristics of convective activity and plateau vortex characteristics in the Asian summer monsoon region and their relationship are analyzed using EOF, wavelet analysis, synthetic analysis and other statistical methods. The results show that: (1) The strongest convective activity in summer from 1979 to 2019 occurred in the South Asian monsoon region, while the weakest was in the East Asian monsoon region. The convection intensity change in the South Asian monsoon region showed an overall in-phase pattern, the East Asian monsoon region showed a north-south anti-phase dipole pattern, and the Tibetan Plateau monsoon region showed an overall in-phase change. (2) The interannual variation of convective activity in the three monsoon regions was significant, and the oscillation periods were 4~8 years in the East Asian monsoon region, 2~4 years in the South Asian monsoon region and 3~8 years in the Tibetan Plateau monsoon region. (3) When the convective activity was strong in summer, the frequency of Tibetan Plateau Vortices increased and the intensity weakened in summer, and they were more likely to move out of the Plateau. (4) The circulation fields of favorable and unfavorable years were analyzed. It was found that the configuration of "upper-level divergence and lower-level convergence" during favorable years was conducive to the occurrence and development of Tibetan Plateau Vortices, while the opposite pattern was observed in unfavorable years.