Abstract: Based on the lightning data of 1989 and 1990 summer in Beijing-Tianjin-Hebei district, the climatological probabilities of the strength and stroke number,the diurnal circle and the spatial distribution are given respectively for negative and positve cloud-to-ground lightninig in this paper.The climatological characteristics of the lightning in Beijing-Tianjin-Hebei district are compared with the states of Oklahoma and Kansas,U. S..The results show that the climatological characteristics of lightning could exhibit the climatological regularity of the convective activity.