The invention provides traditional Chinese medicine for efficiently treating hypertension and a preparation method thereof, and relates to the technical field of drugs for treating hypertension. The traditional Chinese medicine is characterized in that the composition comprises the following components: 10-30 g of eucommia, 5-10 g of pangolin scales, 20-40 g of dipsacus root, 10-30 g of cornus officinalis sieb et zucc, 5-15 g of uncaria, 5-15 g of gastrodia elata, 40-60 g of astragali radix, 20-40 g of puerarin, 15-25 g of salviae miltiorrhizae, 20-40 g of medlar and 20-40 g of radix ophiopogonis. The preparation method comprises the following steps: soaking the drugs for 30 minutes to 1 hour, cooking the drugs at a big fire and cooking the drugs at a slow fire for about 30 minutes; pouring the cooked decoction, adding water in the drugs, boiling and cooking the drugs at slow fire for 30 minutes, mixing the decoction obtained at twice, and taking the same in twice. The traditional Chinese medicine disclosed by the invention can be used for treating hypertensive disorders, reducing the occurrence rate and death rate of heart and cerebral vessels to the maximum and prolonging the life of patients, and is good in drug properties, good in safety, pure natural, free of pollution and free of side effect.