In order to analyse the cloud features of regional hail processes,all the satellite images of 20 processes from 1995 to 1998 are typified and classfied one by one in this paper.A conceptual model of hail clouds that produces hails in the Heilongjiang area and the procedure for hail forecasting are presented based on the detailed analysis and reserch of spatial scale,time scale,top,shape and temperature gradient of hail clouds.