In recent years

based on the characteristics of leading and actively triggering lightning

the scheme to protect the safe operation of the adjacent transmission lines by using triggering lightning tower has been gradually applied in practice. However

the research on the law of the influence of lightning pylons on regional lightning activities is rarely available in the literature

resulting in a gap in the research on the effect and principle of active triggering lightning towers.Cloud-to-ground（CG） lightning activity has the characteristics of clustering in time and space. In order to study the law of lightning activity in the triggering lightning tower area

the grid method is used to delimit the area based on the 2011—2017 lightning activity data in Gaoming area of Foshan（a south city of China）

which is collected by the lightning location system. The massive lightning data in the area are clustered in time and space

and the algorithm of Density-Based Spatial Clustering of Applications with Noise is used to extract the track of lightning activity in thunderstorm time zone and to process the split and aggregation phenomenon in the process of lightning movement. Then

the intensity

the trajectory

and the trend of CG lightning activity are compared and analyzed before and after the lightning tower is put into production. The results show that the triggering lightning tower has certain attraction to the lightning activities

and the probability of lightning striking and discharging in the area greatly increases. Also

the absorption effect of the triggering lightning tower on the lightning cloud charge will reduce the current amplitude to a certain extent after passing through covered area. The direction and proportion of the main lightning corridor have been changed by the construction of triggering lightning tower to some extent. The conclusions can provide reference for the selection of triggering lightning tower project location in the future.