Abstract: As to the configuration problem of lightning arrester in Jinan 1000kV GIS(Gas Insulated Switchgear)substation, the calculation model of overvoltage level of lightning invading wave for 1000kV power distribution equipment is put forward in this paper. Based on this model, the overvoltage level of lightning invading wave of 1000kV power distribution equipment in near and long term is calculated, and the overvoltage waveform of lightning invading wave on the different equipments is obtained. Then the characteristic of amplitude and catadioptric law of lightning overvoltage in different configuration scheme of lightning arrester is analyzed. In the end, according to the analysis results and the requirement of regulations, the optimized configuration scheme of lightning arrester is proposed based on overvoltage level of lightning invading wave, which provides effective support for optimizing design.