近年来川中丘陵区季节性干旱频繁发生,对四川省农业生产造成严重影响。根据川中丘陵区8个气象站点1960年—2011年的逐日气象资料,选用国家标准中相对湿润度指数作为干旱指标,采用线性趋势法、morlet小波及反距离加权插值法,研究川中丘陵区季节性干旱频率和强度的时空分布特征。研究结果表明:川中丘陵区不同季节干旱频率和强度差异大,春冬两季的干旱频率和强度显著大于夏秋两季,干旱发生主要集中在春冬两季;时间上,春旱和秋旱呈加重趋势,夏旱和冬旱呈减轻趋势,其中春旱有3个周期演变规律,冬旱有2个周期演变规律;空间上,春夏两季川中丘陵区中部为干旱高发区,秋冬两季川中丘陵区北部为干旱高发区。该研究可为川中丘陵区制定防旱减灾措施提供理论依据。 In recent years, seasonal droughts in the hilly areas of central Sichuan have been frequent and have had a serious impact on agricultural production in Sichuan Province. Based on the daily meteorological data of 8 meteorological stations in the Central Sichuan Hilly Region from 1960 to 2011, the relative humidity index of the national standard was selected as the drought index. The linear trend, morlet wavelet and inverse distance weighted interpolation were used to study the seasonal Spatiotemporal distribution of drought frequency and intensity. The results show that the frequency and intensity of drought in different seasons in the central part of Sichuan Province are quite different, and the frequency and intensity of drought in spring and winter are significantly larger than those in summer and autumn. The occurrence of drought is mainly concentrated in spring and winter. The trend of summer drought and winter drought showed a decreasing trend, of which spring drought had three cycles of evolution and winter drought had two cycles of evolution. Spatially, in spring and summer, the middle part of central Sichuan hilly region was arid and drought-prone area, autumn and winter The northern part of the hilly area in central Sichuan is a high-arid area. This study can provide a theoretical basis for formulating drought prevention and mitigation measures in the hilly area of ​​central Sichuan.