This paper investigates the evolution of extreme climate indices in Zunyi City from 1974 to 2023 to provide a scientific basis for disaster prevention and mitigation. Based on 50_year daily data from 12 meteorological stations, 27 extreme indices are calculated with the RClimDex model, and the spatiotemporal characteristics of the extreme indices are analyzed by the methods of Wavelet analysis and the Mann_Kendall test. The results indicate that: (1) There was a significant asymmetric transformation in extreme temperatures characterized by " declining cold extremes and intensifying warm extremes " in Zunyi City during the 50 years. The numbers of cold days (TX10p) and cold nights (TN10p) decreased at rates of 0. 89 day and 1. 87 day per decade while warm days (TX90p) and warm nights (TN90p) increased at rates of 1. 85 day and 1. 88 day per decade, respectively. (2) Extreme precipitation did not show systematic intensifying trend over the 50_year period. Only consecutive wet days (CWD) decreased significantly at the rate of 0. 23 day per decade. Although interannual fluctuations existed in the maximum daily precipitation and heavy rain days, the fluctuation trend failed to pass the significance test. (3) The fluctuation periods of temperature indices (3. 0 - 14. 9 years) were generally shorter than those of precipitation indices (3. 7 - 21. 1 years). Furthermore, cold indices exhibited shorter dominant periods (3. 2 - 5. 3 years) compared to warm indices (4. 0 - 8. 6 years). (4) The years from mid_1980s to the early 21 st century was identified as a key transitional period, during which abrupt changes occurred in most indices, such as frost days (FD0) and warm days (TX90p). Persistent prediction suggests that the observed trends would continue in future extreme high_temperature and heavy precipitation events, while the decline in cold events might become a long_ term, irreversible process. (5) Principal component analysis reveals that temperature variability is dominated by intensified warming and a decline in low_temperature extremes, whereas precipitation changes are characterized by a coordinated enhancement of extreme precipitation intensity and total amount. In conclusion, extreme climate events in Zunyi City are evolving with intensifying high temperatures, weakening cold events, increasing precipitation variability, and rising drought risks, and the early 21 st century is marked as a critical transition phase of these climate indices.