To study road rain runoff pollution load in south china, the changes of pollutant concentration and pollution load during four typical rainfalls at Chongqing and Suzhou were compared and analyzed. The results showed that the rain type was a important influence factor of the distribution of pollution load. The runoff or rainfall change tendency of Ⅶ type rainfall was similar with pollution load of II type rainfall. The correlation of pollutants concentration and pollution load was not good. There was obviously correlation between the runoff (or rainfall) and pollution loads of SS/TSS, TP and Pb. The runoff pollution control of southern urban road should also control the pollutants total quantity while intercepting high concentration initial rain.