Based on the three-dimensional lightning location data of VLF/LF in Yunnan Province from 2017 to 2018 and the data of artificial observation thunderstorm days in Yunnan Province from 1987 to 2006,and using mathematical statistics,spatial interpolation and other methods,this paper studied the spatial and temporal distribution characteristics of lightning activity in Xishuangbanna area,known as a thunderstorm capital.The grid method was used to transform the lightning location data into a grid lightning activity days,to study the correlation between artificial observation thunderstorm days and lightning location monitoring data.Results show that the lightning activity in Xishuangbanna area begins to increase gradually from March,and the peak appears from July to August.The lightning frequency of intra-cloud flash is less than that of cloud-to-ground flash,the lightning frequency of positive flash is less than that of negative flash,and the lightning frequency of positive cloud-to-ground flash in Xishuangbanna area is significantly more than that in other areas of Yunnan Province.In November,the lightning intensity is larger,but the frequency is less.In July,the lightning frequency is more,but the intensity is smaller.Most intra-cloud flashes occur below 8 km,with an average height of 4.914 km.The density distribution of cloud-to-ground flash and intra-cloud flash is the same,higher in the north and lower in the south and east-west.The intensity of intra-cloud flash is significantly higher than that of cloud-to-ground flash,but the spatial distribution is weak in the north and strong in the south and east-west.The monthly distribution characteristics of the observed thunderstorm days are consistent with those of the grid lightning activity days.The study also shows that Xishuangbanna is the area with the most observed thunderstorm days and the area with the most grid lightning activity days in Yunnan Province.