Abstract: Based on the daily precipitation data of 4 meteorological stations in southeastern Tibet from 1971 to 2020, ten extreme precipitation indices were selected. By using the Mann-Kendall non-parametric test, R/S analysis, Morlet wavelet analysis, the temporal and spatial characteristics of extreme precipitation index in southeastern Tibet were analyzed. The results show that the extreme precipitation indices had little change in southeastern Tibet from 1971 to 2020. The RX1day, R20mm, CWD, R95pTOT and PRCPTOT appeared a decreasing trend, especially the PRCPTOT decreased significantly with a rate of −38.43 mm·10a⁻¹ in the past 30 years (1991~2020). Other indices tended to increase, with the CDD showed the highest value (1.31d·10a⁻¹). In terms of decadal variations, the extreme precipitation indices were positive in the 1990s and negative in the first decade of the 21st century. The Hurst index of the extreme precipitation indices showed strong or stronger persistence, which would maintain the trend of nearly 50 years in the future. Only the CDD had an abrupt change in 2002. There were significant periods of 3 to 4 years for most extreme precipitation indices. Except for CDD and CWD, the other extreme precipitation indices had significant positive correlations with each other, and all extreme precipitation indices appeared significant correlations with annual precipitation and total precipitation during the flood season. It is also found that most of the EPI were insignificant correlated with the atmospheric circulation indices, and only RX1day, RX5day, R95pTOT had significant negative correlations with the Asian polar vortex area index, meanwhile there was the significant positive correlativity between RX5day and Western Pacific subtropical high intensity index. Only CWD was significantly positive correlated with sunspot. RX5day, PRCPTOT, CDD also had a significant correlation with the equatorial Pacific sub-surface SST index. RX5day was positively correlated with Indian Ocean warm pool area and intensity index, and CWD was negative correlated with the Western Pacific warm pool area index.