With the lightning positioning data from 2007—2010 measured by 52 lightning detection stations of 5 provinces in central China,this paper analyzes the daily change,intensity,slope and density of lightning distribution for four seasons.The results show that the occurrence time of the positive and negative lightning peak value and their daily variation curve for four seasons are not identical.The lightning mostly occurs in the period from afternoon to evening (12:00—20:00) during summer and autumn,which presents a single peak change,and the peak value usually appears in 16:00—18:00.While during winter and spring,the lightning mostly occurs in the period from evening to before dawn (20:00—2:00),which presents a single trough change,and the valley value appears in 10:00—14:00.Lightning intensity and slope change little during four seasons.The intensity and slope of positive lightning are higher than that of negative lightning,and the highest lightning slope appears in summer,while the biggest lightning intensity appears in winter.The positive and negative lightning intensity mainly distributes in 10-40 kA,more than 90％ of lightning intensities are less than 80 kA,and 95.5％ of lightning intensities are less than 100 kA.There is considerable variation in seasonal lightning density distribution in the five provinces.During spring,the lightning density is higher in central part than in north and south part,and in summer and winter,the lightning density increases gradually from south to north,while in autumn,it increases gradually from north to south in the five provinces.