With global warming,extreme high temperature weather occurs frequently,which greatly affects rice production.Therefore,this study used the daily climate data from 6 agricultural meteorological stations in Hunan Province from 1961 to 2020,the cumulative anomaly,Mann-Kendall test and Morlet wavelet methods were used to analyze the characteristics of temperature variation and occurrence regularity of high-temperature heat damage during the critical development stage of rice(July 1 to August 20)in Hunan Province in the past 60 years.The results showed that in the past 60 years,the minimum and extr...