Abstract: In this paper, based on the lightning images from observation tower in Shiyan Observatory of Shenzhen Meteorological Bureau and COMSOL simulation, a simulation channel close to natural lightning is established to model the surrounding environment of the building and the observed lightning channel (taking landmark buildings and building groups in Shenzhen as an example). Meanwhile, the connection process between the downward leader and the upstream leader stimulated by the raised objects (such as towers and tall buildings) is analyzed when the downward leader approaches the ground. The influence of the high buildings on the induced charge and current on the top of the natural lightning is also analyzed, and the specific quantitative indicators are obtained. In most cases, the enlargement coefficient of high buildings to the induced charge and current caused by lightning ranges between 2 and 4.5, and that whether there are surrounding buildings or not has little influence on such coefficient.