The invention relates to additive composite premix and batch for prepubertal gilts, and belongs to the feed field. The premix of the invention comprises the following main components: compound vitamins, inorganic trace elements, organic trace elements, constant mineral matter, amino acids, phytase, a mold toxin adsorbent, a microecological preparation, plant extracts, and an anti-oxidant. The premix of the invention has a reasonable formula; based on special demand of prepubertal gilts, the adding amounts of vitamins, organic trace elements, and lysine are strengthened; the reserve of nutrients in body is increased; the anti-stress capability is improved; and the health of limbs and hooves is maintained. When prepubertal gilts are fed by the recommended formula, the elimination rate of prepubertal gilts caused by limb and hoof health problems and breast and pudendal dysplasia is greatly decreased from about 60 kg to the third sexual period; the oestrus interval is greatly shortened; the back fat thickness at the P2 point at puberty is more than 16 mm, which completely meets the body condition requirements for first mating; and the invention facilitates the prolongation of the service life of the breed.