Based on the hail data at 90 weather stations in Xinjiang from 1961 to 2003,the climatic characteristics of local, general and systematic hail weather processes were analyzed.Through general in searching of the history synoptic maps in 43 years, the systematic hail weather processes were divided into three kinds of weather patterns, and their fieldof physics quantity and circulation pattern were analyzed.Through general searching of GMS 5 infrared cloud image in 1998-2001, 438 hail cloud-clusters were found in Xinjiang.They are on small scale, irregular figure and high TBB, and the majority of hail cloud were convective cloud-clusters.