The invention belongs to the field of traditional Chinese medicine, and relates to a traditional Chinese medicinal preparation for treating primary hypertension and a preparation method of the traditional Chinese medicinal preparation. The traditional Chinese medicinal preparation is mainly prepared from the following raw materials in parts by weight: 20-30 parts of folium ciematis, 20-28 parts of vitex negundo var. cannabifolia, 25-35 parts of root of Yunnan glorybower, 12-18 parts of radix aucklandiae, 15-23 parts of bulbus allii macrostemi, 15-20 parts of white atractylodes rhizome, 15-25 parts of rhizoma dioscoreae, 8-12 parts of cortex moutan, 8-15 parts of radix scutellariae, 7-13 parts of cortex albiziae, 8-15 parts of semen ziziphi spinosae and 5-13 parts of liquorice root. The traditional Chinese medicinal preparation disclosed by the invention is reasonable in medicine prescription and strong in synergistic effect; and the traditional Chinese medicinal preparation, on treating the primary hypertension, is significant in curative effect, stable in efficacy, low in side effects of medicines and obvious in clinical popularization value.