In August 2022, multiple rainstorm events occurred on the western edge of the Tarim Basin, resulting in the Tarim River's inflow reaching peak in recent 10 years. Based on conventional observations, NCEP reanalysis data, and water vapor tracking model, this paper comparatively analyzed the similarities and differences in upper-and lower-tropospheric atmospheric circulation patterns, water vapor transport and budget, and contributions of water vapor from different pathways associated with three rainstorm events consecutively occurring during August 16-18 ("08·16"), 20-23 ("08·20"), and 25-28 ("08·25"). The results indicate that the similarities among the three rainstorm events are mainly as follows: the 200 hPa subtropical westerly jet is located near 40°N, while the 500 hPa circulation is controlled by central Asian low-pressure system and the 700 hPa circulation is characterized by the convergence of westerlies and easterlies. Mid-to-upper level moisture transport is successively from the Atlantic Ocean via the northern Caspian Sea and southern Balkhash Lake to the rainstorm area, while low-level moisture transport mainly originates from the Arabian Sea, Bay of Bengal, and the southern Xinjiang Basin, in which the moisture inputs from the western and southern boundaries are the most significant. Their differences are as follows: during the "08·20" and "08·25" events, the 100 hPa South Asian High exhibits a zonal distribution and appears to be stronger in the east, while it features a bi-mode during the "08·16" event. Moisture transports at 700 hPa and 500 hPa are the strongest along a southwest path during the "08·16" and "08·20" events, while they are mainly along a southern path during the "08·25" event. Moisture input from the western boundary is the greatest during the "08·16" and "08·20" events, while that from the southern boundary is the largest during the "08·25" event. There is an additional moisture input from the eastern boundary during the "08·20" and "08·25" events.