Abstract: The inhibitory activity of the extracts from three species of plants (Artemisia annual L., Artemisia capil-laris, Artemisia argyi Levl. et Vant) against Fusarium oxysporum f. sp. vasinfectum and Fusarium moniliforme were studied under the condition of laboratory. The results showed that the extracts of all the three plants in Artemisia showed strong antifungal activity against the tested pathongenic fungi, Especially the antifungual activity of the extract of Artemisia argyi was stronger and stabler. The rates of inhibition to the two pathongenic fungi, were over 80% in 48~96 hours after test. At the same concentration, the extract of the plants in Artemisia show little inhibition to F. oxysporum f.sp.vasinfectum. The extract from Artemisia argyi showed stronger antifungal activities than the 95% ethanolof extract .The EC50 of the former was 1.4785 mg/L and the EC50 of the later was 3.2090 mg/L .As far as antifungal activities was concerned, the antifungal activities of every method extract was similar by the same solvent, and the rates of inhibition to F. momiliforme were 84.34%, 84.56% and 88.7% after 72 hours, respectively.