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依据《中国减灾》公布的1990～1996年月灾情信息，建立了冰雹灾害数据库。在此基础上，划分了中国冰雹灾害的组合类型，并绘制出了冰雹灾害的空间分布图和时间变化图。对1990~1996年的雹灾灾情研究结果表明：（1）冰雹灾害共有四种组合类型，其中以链发类型为主。（2）冰雹灾害的空间分布与冰雹致灾的空间分布相比，有明显的东移和四块状发展趋势；与1990年以前相比，其范围呈现增大并向东、向西北和向南扩展的格局。（3）冰雹灾害年内变化呈双峰态，4月和7月发生频率最大，且表现出峰值提前的特征；各年间冰雹灾害月动态变化幅度相差很大；年内冰雹灾害与冰雹峰值明显不同，充分反映了土地利用空间格局对冰雹灾害年内峰值变化的影响．（4）中国冰雹灾害季节变化的区域可划分为七种类型，其中西南类型具有年内三个峰值的特征。
According to the disaster information published in China for disaster mitigation from 1990 to 1996, a hail disaster database was established. On this basis, the type of hail disaster in China is divided and the spatial distribution map and time change map of hail disaster are drawn. The results of hail disaster in 1990 ~ 1996 show that: (1) there are four types of hail disaster combined, of which the main chain type. (2) Compared with the spatial distribution of hail disaster caused by hail disaster, the spatial distribution of hail disaster has a clear trend of eastward migration and quadrilateral development. Compared with that before 1990, the scope of hail disaster has increased and the eastward, northwestward and South expansion of the pattern. (3) The hail disaster changed in a bimodal state during the year, with the highest frequency in April and July and the characteristics of early peak. The monthly dynamic changes of hail disaster varied greatly. The hail disaster and hail peak were obviously different during the year, It fully reflects the influence of spatial pattern of land use on the peak change of hail disaster during the year. (4) The seasons of hail disaster in China can be divided into seven types, of which the southwest type has the characteristics of three peaks in the year.