The invention relates to a Chinese medicinal composition for treating knee osteoarthritis. The Chinese medicinal composition consists of the following Chinese medicinal raw materials by weight: 10 to 30 grams of prepared rehmannia root, 10 to 30 grams of malaytea scurfpea fruit, 10 to 30 grams of epimedium herb, 10 to 40 grams of Chinese taxillus twig, 10 to 30 grams of Himalayan teasel root, 10 to 30 grams of east asian tree fern rhizome, 10 to 40 grams of white paeony root, 10 to 30 grams of kudzuvine root, 10 to 30 grams of papaya, 5 to 20 grams of chaff flower root, 10 to 30 grams of clematis root, 10 to 30 grams of yanhusuo, 10 to 30 grams of eucommia bark, 5 to 20 grams of safflower, 10 to 40 grams of Chinese angelica and 5 to 15 grams of honey-fried liquoric root. The Chinese medicinal composition has the effects of tonifying liver and kidney, strengthening muscles and bones, clearing heat and expelling damp, tonifying qi and blood and eliminating cold and dredging collaterals, and has a reliable curative effect on knee osteoarthritis. The composition is easy and convenient to prepare, wide in medicinal source and mild in medicinal properties of ingredients, and does not have any side effect.