The invention disclose a Chinese medicinal herb extract, which is prepared from the following bulk pharmaceuticals in parts by weight: 20-55 parts of vine of multiflower knotweed, 5-25 parts of Chinese honey locust, 15-40 parts of oriental waterplantain rhizome, 5-25 parts of black sesame, 15-40 parts of yerbadetajo herb, 5-25 parts of ginkgo leaf, 5-25 parts of Chinese arborvitae twig, 5-15 parts of pepper, 15-40 parts of fortune's drynaria rhizome and 5-25 parts of garden balsam stem. The preparation method comprises the following steps: extracting pepper volatile oil, performing water extraction on the vine of multiflower knotweed, the Chinese honey locust, the oriental waterplantain rhizome and the garden balsam stem, and performing alcohol extraction on the black sesame, the yerbadetajo herb, the ginkgo leaf, the Chinese arborvitae twig and the fortune's drynaria rhizome. The Chinese medicinal herb extract can prompt scalp blood circulation, has the effects of blackening and growing hairs, preventing and stopping alopecia, removing dandruff and relieving itching, is prepared with the simple preparation method, and is low in cost. Shampoo made of the Chinese medicinal herb extract is uniform and fine, is rich in foam, is easy to flush completely, does not cause any allergic reaction after use, is free from toxic and side effects, helps smoothening and softening hairs, is durable in dandruff removing and itching relieving effects, can blacken and grow hairs and prevent and stop alopecia after long-term use, and is suitable for customers to use in daily life for a long time.