The five indicators(DO、COD_Mn、NH₃-N、TN、TP) were chosen as evaluation factors according to the characteristic of pollution factors and the survey and monitoring results of Xunjiang in Wuzhou section in 2004～2008.Fuzzy comprehensive evaluation model was applied for comprehensive evaluation of water quality.The water levels of the monitoring section were calculated.The results showed that TN weight was larger than the others in five evaluation indicators of Xunjiang in Wuzhou section.The main pollutant of water body was TN.GradeVemerged in two sections in varying degrees.GradeV water quality belonged to moderate pollution.The water quality of part-time accorded with the fishery waters requirements of Surface Water Environmental Quality Standard(GB3838-2002).