Abstract: In context of global change and disasters increase,it was necessary to explore the temporal and spatial characteristics and evolution law of climate disasters in the historical period.Statistical analysis,moving average,EOF and GIS spatial analysis were applied to ancient climate analysis through historical documents.The time and spatial distribution of flood disasters' frequency,intensity and evolution law in Guangxi during Qing Dynasty were explored.The frequency and intensity were reflected in the map of the Qing Dynasty,which was accurate to the county scale and improved the accuracy of historical climate disaster study.In the Qing Dynasty,there were 718 flood disasters with county level in Guangxi,the flood frequency in the late Qing Dynasty increased significantly,the frequency in the East was higher than that in the West.Flooding intensity were 2—3 grade in most areas.The main spatial distribution pattern of EOF analysis was the region consistent type.The others were reverse form of the North and South,opposite in Northeast to Southwest.During Qing Dynasty,the area was dominated by partial flood.The flood disasters were more serious in the early and the late Qing Dynasty.