Abstract: Based on high-resolution OLR data from the Indian geostationary meteorological satellite, the precipitation data obtained by the National Meteorological Science Data Center and ERA5 reanalysis data, a severe precipitation event over the Tibetan Plateau (TP) and its downstream areas induced by the synergistic effect of strong convection over the TP and the eastward movement of the Tibetan Plateau vortex (TPV) from 12UTC on June 26th to 12UTC on July 1st, 2016 was diagnosed and analyzed. The results indicate that the feedback synergy between the strong convection over the TP and the eastward movement of the TPV has a significant impact on the extreme heavy precipitation process over the TP and its downstream from the eastern Sichuan to the Jianghuai River basin. First of all, on June 28th, 2016, the TPV generated in the west of the TP and stimulated the Tibetan Plateau convection. On June 29th, the Tibetan Plateau convection strengthened and moved eastward under the feedback of the TPV. The OLR value of the strong convection centre in the central plateau was lower than 110W/m², and there was a regional heavy precipitation on the TP. Subsequently, the strong convection over the TP moved eastward with the TPV, and the TPV evolved into a low-pressure trough moving eastward after moving out of the plateau. At the same time, due to the influence of the consistent circulation conditions in the troposphere, which was conducive to the vertical upward movement and the eastward movement of convection, the convection development was extremely strong, leading to a sustained heavy rainfall process from June 30th to July 1st from Sichuan-Chongqing to Jianghuai regions of China. Especially, from eastern Hubei to western Anhui, there were 6 stations with 24-hour precipitation higher than 200 mm, and 3 stations even higher than 300 mm, far exceeding the extreme precipitation threshold of 99 percentile.