In this paper,we analyzed the spatial distribution and temporal variance of lightning frequency by using lightning positioning data in China during 2008 and 2010.Based on Price's theory,we estimated the quantity of NOx emission produced by lightning (LNOx) and preliminarily analyzed the temporal and spatial distribution of LNOx.The results showed that lightning occurred more frequently in July and August and mainly in Guangzhou and Wuhan.LNOx was mainly distributed in the area of 25-40°N and 105-125°E.The quantity of LNOx in Wuhan,Guangzhou,Chengdu,Chongqing,Changsha,Nanjing and Nanchang are higher than that in other regions,and the maximum could reach up to 1.23×10⁷g each grid.August saw the highest yield while the second highest was July.Furthermore,the seasonal characteristics of LNOx distribution were obviously,and the percentages in spring,summer,autumn and winter were 4.8%,89.4%,5.3% and 0.5% respectively.LNOx mainly appeared in Guangzhou area in spring while in summer it moved northward and became wide and strong.The distribution area decreased in autumn and the maximum occurred in Guangzhou.In winter,the quantity of LNOx decreased significantly with its maximum appearing in the southwest of Wuhan.