This paper analyzed the temporal and spatial distribution of heavy rainfall in China from 1951 to 2000.The results showed that since 1980s,the occurrence frequency of rainfall and major storm disasters increased significantly in Sichuan Province.In 1990s,Hebei heavy rainfall frequency and major storm disasters had increased remarkably.Heavy rainfall occurred mainly from May to August.The heavy storm largely took place from April to September.Catastrophic rains occurred in October in 1990s.Liaoning and Hubei...