To comprehensively understand the spatiotemporal variations of temperature at the seasonal scale in the Sichuan-Chongqing region, Bbased on the daily observation data of temperature from 53 meteorological stations in Sichuan-Chongqing region during 1961-2020, the spatiotemporal characteristics of temperature change in Sichuan-Chongqing region were analyzed by linear trend method, Pettitt test, wavelet analysis, and other methods. Major conclusions are as follows:The results show that: (1) The spatial distribution of temperature in Sichuan-Chongqing region mainly showed a trend of increasing from northwest to southeast, while the distribution of diurnal temperature range decreased from northwest to southeast. (2) In the past 60 years, the temperature in Sichuan-Chongqing region has shown an increased trend, among which the annual average daily minimum temperature (0.29 °C/10 a) had the largest increase rate, followed by the annual average daily maximum temperature (0.25 °C/10 a) and the annual average temperature (0.23 °C/10 a), while the annual average diurnal temperature range has shown a slightly decreasing rate (-0.04 °C/10 a). (3) Both the Sichuan-Chongqing region and its three sub-regions (northwest Sichuan plateau, southwest Sichuan mountainous region and Sichuan basin) had the largest warming rate in winter and the smallest in summer. (4) The mutational years of daily average temperature, daily maximum temperature and daily minimum temperature in Sichuan-Chongqing region were 1997, 1997 and 1993, respectively. Periodicities of approximately 5 years and 12-15 years were identified, characterized as primary and secondary cycles of 14 years and 5 years. (5) Among the three sub-regions, the most significant temperature increase was observed in the southwest Sichuan mountains, while the Sichuan Basin showed the smallest temperature increment. In the southwest Sichuan mountains, the region of Muli experienced the most notable warming trend with an annual average temperature increase of 0.74 °C/10 a, while the region of Daocheng in the same area exhibited the most significant decrease in diurnal temperature range at -0.45 °C/10 a. (6) The mutation of daily minimum temperature was the earliest in the three sub-regions. For the same meteorological element, southwest Sichuan mountainous region were the first to undergo mutation. In general, the temperature changes in different sub-regions have certain spatial differences, which are closely related to geographical environment, climate background and human factors.