Abstract: This paper has collected 28 of hail days over East Guangdong during 1971-1985. Climatic feature, Circulation type, energy field, geopotential stability field, perpendicular distibution of local atmospheric features, local atmospheric stability, feature of setellite cloud picture and so on have been computed and analysed.The weather features before fall hail and the difference between spring and summer over East Guangdong have been understool preliminarily. Thereby some jndexer of physical quantity and four synoptic models have been established. It provides some bases for the radar enhance observation and made short-time forecasting for fall hail area. At last, the procedure chart has been made as well for applying to operational forecasting.