The invention discloses a traditional Chinese medicinal capsule for treating hypertension and a preparation method thereof. The traditional Chinese medicinal capsule for treating the hypertension is mainly prepared from the following raw materials: selfheal, root of kudzu wine, radix bupleuri, bark of eucommia, herba taxilli and astragalus membranaceus, and the raw materials such as herba siegesbeckiae, szechuan lovage rhizome, root of bidentate achyranthes, salvia miltiorrhiza, polygonum cuspidatum, yang tonifying herb, lysimachia christinae hance, coix seed, medlar, white paeony root, cassia seed, oriental wormwood, lophatherum gracile, root-bark of tree peony and liquorice can be added, so that treatment effect can be better, and a specific technology is adopted for processing, so that the traditional Chinese medicinal capsule for treating the hypertension is obtained, curative effect of the traditional Chinese medicinal capsule for treating the hypertension is good, absorption and regulation abilities of the middle-aged and aged people can be enhanced, and curative ratio is more than 90%.