In order to understand the characteristics of selenium（Se）distribution for environment-plant system in the Longfeng wetland of Daqing City,soil,water and reed were collected in the spring of 2011.Thecontent of Se was measured using hydride generation-atomic absorption spectrometry（HGAAS）and the relationship among the three samples was analyzed by statistical methods.Results show that the content of Se insoils was 129.63～142.18μg/kg,the mean of water Se content was 3.87～7.02μg/L,and the contents ofSe for reed root,stem and leaf were 50.17,18.29and 15.68μg/kg,respectively.The results show thatthere was a significant positive correlation in content of Se between soil and reed.Reed enrichment in Se fromthe environment was weak,and thergfor was a non-enriched Se plant.