The invention discloses an additive of compound Chinese medicinal herb feed for piglets. The additive is characterized by being prepared from the following preparation raw materials in parts by mass: 1 to 2 parts of multivitamin, 1 to 2 parts of table salt, 3 to 6 parts of radix astragali seu hedysari, 4 to 7 parts of radix isatidis and 10 to 30 parts of garlic. According to the additive disclosed by the invention, the garlic, the radix astragali seu hedysari, the radix isatidis, the table salt and the multivitamin are reasonably proportioned and combined, and three Chinese medicinal herbs can realize the effects of sterilizing, disinfecting and diminishing inflammation; however, the inventor finds out that after the Chinese medicinal herbs are compounded according to the specific ratio, the Chinese medicinal herbs can be mutually cooperated and a few of additive can remarkably enhance the immunity of the piglets, the diarrhea rate is reduced, and the growth performances and all physiological and biochemical properties are improved when the effect is compared with the effect of the single Chinese medicinal herb; a pork product which is green and safe and has no antibiotics and no pollution can be produced. The preparation process is convenient and rapid and is convenient to develop and implement in a farm.