Based on the data of raindrop size distributions(RSDs) and lightening over the Leizhou peninsula in August 2007, this paper analyzed the(RSDs) of a thunderstorm at Suixi and Zhanjiang on 6 August 2007 and the relationship between lightening and precipitation.The results showed that the RSDs were mostly bi-peak or multi-peak spectra at Suixi while they were mainly single-peak spectra at Zhanjiang.The spectra were all fitted with Gamma distribution.The lightning strokes were higher in heavy rain(I>10 mm/h) than in the precipitation with lower rain rate.The strokes of lightning also increased when it got closer to the station in heavy rain(I>10 mm/h).The positive ground flash frequency rose obviously with increasing rain rates.The relationship between lightning frequency and distance-normalized current intensity in the precipitation suggested that a higher occurrence frequency of cloud-ground(CG) lightning in shorter distance was associated with broader raindrop size spectrum and higher rain rates.