A technical process for extracting active compounds of ginkgolic phenols and acids from the testa of (ginkgo) biloba L. by adding organic solvent ethanol etc.and water was introduced. TLC scanning determination was adopted to determine the products. The operation conditions of extracting were optimized by orthogonal (experiments.) The results show that ethanol is a perfect extracting solvent. Extractions have good effects on 3 kinds of plant (germina) and 2 kinds of plant insects.