Buckwheet seeds were soacked with different concentration of KMnO_4(0.1%;0.3%;0.5%) for different time (1min;3min;5min)to determine the effect of KMnO_4 on germination of buck wheat seeds.The results showed that KMnO_4 inhibits obviously seed germination,and the ratio of germination reduces for increasing along with eoneentration of KMnO_4 and the time of soaking seeds.