The invention provides a traditional Chinese medicine composition for treating endometriosis and a preparation method thereof, and relates to the technical field of traditional Chinese medicines. The invention relates to a traditional Chinese medicine composition for treating endometriosis. The traditional Chinese medicine composition is prepared from the following raw materials: Salvia pachysandra, Semen et Herba Lysimachiae, evergreen mucuna root and leaf, ground beetle, rape seed, Artemisia anomala, Salvia chinensis, Rhodiola rosea, Glycyrrhiza foenum-graecum, Polygonum hydropiper root, Rhizoma Corydalis, processed Rhizoma Cyperi, Fructus Toosendan and honey-fried licorice root. The medicine prepared by the invention has the comprehensive effects of promoting blood circulation to remove blood stasis, warming meridians to relieve pain, eliminating mass and resolving masses and tonifying kidney and spleen, promotes blood stasis to dissolve and internally eliminate so as to achieve smoothness, has a unique curative effect on dysmenorrhea, infertility, abdominal mass accumulation and other symptoms caused by endometriosis, can reduce the relapse rate, has an obvious long-term treatment effect and small toxic and side effects, and has a remarkable improvement effect on liver depression and qi stagnation andobstruction of collaterals by blood stasis, and therefore, the traditional Chinese medicine composition has a very good effect on treating the disease.