Abstract: In this article,digital seismic source spectrums of Guangxi earthquakes are analyzed,which include that induced by storm or reservoir and the natural occurrence.By calculating Lingyun-Fengshan earthquake swarm,the earthquakes (M_L≥2.5)being adjacent to Longtan reservoir and the natural earthquake in southeastern Guangxi in 2007 to 2013,their parameters of seismic source are acquired respectively. The results indicate that for Lingyun-Fengshan and Longtan reservoir earthquakes,their stress drop, source radius and corner frequency are nearly the same at the range of values and the average.Their stress drop and the corner frequency are significantly less than these earthquakes in southeast of Guangxi.And their stress drops are smaller about 1order of magnitude.However,the source radiuses are significantly greater than that of the same seismic magnitude in southeast of Guangxi.The above of characteristics show that spectrum analysis of digital seismic wave can also reflect the storm-induced cause of Lingyun Fengshan earthquake swarm.