Effect of Na_2seo_3 on passive Heymann Nepharitis in rats was studied.The resuIts confirmedthat AIb,BUN,Chol and urine protein in experiment groups reduced than in control group,andthere were more slight pathologic change in ante—riority compared with posteriority.Abovephenomena associated with enhance of insistent oxydation by Se.It is Cnsidered that perhaps toadminister properly Se to the patient with immune complex diseases and immune complex—re-lated diseases is effectice