The invention discloses an antihypertensive medicament which is prepared according to conventional method and comprises the following raw materials in parts by weight: 5 parts of szechwan lovage rhizome, 7 parts of argyi leaf, 10 parts of Chinese taxillus herb, 3 parts of mulberry leaves, 5 parts of earthworm, 7 parts of peach kernel, and 8 parts of motherwort seed. The antihypertensive medicament provided by the invention has particularly good effect in maintaining and lowering blood pressure, and has the total effective rate of 98%.