The invention discloses a traditional Chinese medicine composition for treating coronary heart disease, and a preparation method thereof, belonging to the field of preparation of traditional Chinese medicines. The traditional Chinese medicine composition comprises the following medicines in parts by weight: 27-45 of ginseng, 28-56 of hemlock parsley and 15-30 of asarum herb. The preparation method of the traditional Chinese medicine composition comprises the following steps of: respectively extracting the ginseng, the hemlock parsley and the asarum herb, then mixing the extracts of the three medicinal materials, and adding conventional auxiliary materials to prepare various common oral preparations. The traditional Chinese medicine composition disclosed by the invention has the advantagesof small medicinal odor, obvious therapeutic action and small side effect, and can quickly alleviate the symptoms of angina pectoris after being taken by patients. The traditional Chinese medicine composition disclosed by the invention has easy availability of raw materials, a simple preparation process and wide application prospects, and is suitable for large-scale industrial production.