The pesticidal and bactericidal effects of ginkgolic acid extracted from Ginkgo exocarp was studied. The mixture of ginkgolic acid, ginkgetin and isoginkgetin had remarkable antiblastic effect to nosogenesis epiphyte, anti\|anaphylactic and antiinflammation effects. The contents of ginkgolides, trace element, amino acid and protein in Ginkgo exocarp were determined. The results has laid solid foundation for the development and utilization of Ginkgo exocarp.