The invention discloses a green immunopotentiator for pigs. The green immunopotentiator has various functions of prevention, healthcare, treatment, immunoregulation and the like. The green immunopotentiator for the pigs is an ideal, green, environment-friendly, safe and novel feed additive replacing an antibiotic drug. Compound Chinese herbal medicines such as houttuynia cordata, kudzu vine roots, gynostemma pentaphylla, isatis roots, glossy privet fruits, enteromorpha, liquorice, radix scutellariae, acanthopanax, folium isatidis, Chuanxiong rhizome, honeysuckle and stevia are subjected to 'Chinese herbal medicine ultrasonic wave-assisted extraction, multi-strain aerobic fermentation and anaerobic fermentation combined two-step fermentation' to obtain the fermented Chinese herbal medicine feed additive. The fermented Chinese herbal medicine feed additive has double advantages of the Chinese herbal medicines and probiotics, health of pig intestinal tracts can be efficiently conditioned, both principal and secondary aspects of diseases are treated, vital essence is reinforced, primordial qi is strengthened, intestinal micro-ecological balance and optimal immune state are kept, the digestion and absorption rate of nutrient substances is increased, pig body immunity is enhanced, raising income is increased, raising risk is reduced, and the feed additive replaces antibiotics, has no negative effect on the pigs, avoids the problems of drug residues, drug resistance and the like, and has a wide market prospect.