Based on the data of daily frost and air temperature in 1960—2008 from 240 stations,we analyze the temporal and spatial distribution of frost in southern China using regression analysis,accumulative anomaly,discrete power spectrum,correlation analysis,and GIS spatial analysis function.The result shows that in terms of the temporal variation,annual average freezing days gradually increase during 1960—1986 and rapidly decrease during 1987—2008.Frost mainly occurs in January,December and February.The potential cycles are mainly mediumlong cycles,such as 490,245,163 and 41 a.In terms of the spatial distribution,frost frequency and intensity show distinct latitudinal zonation and vertical zonation,which decrease with latitude and are higher in the east and west than in the middle of southern China.