Based on the surface rainfall data of 93 stations of Guangxi Province and the 714SD radar data in Nanning,the distribution characteristics and the physical characteristics of summer convective precipitation in Guangxi are analysed.It indicates that the distribution of summer convective precipitation is ununiformed and varied for regions, and time.The echo characteristics and the precipitation rule are analysed by using the echo data, as well as theZ-Irelation is calculated.