The invention provides a pig feed with the effect of enhancing the body constitution of a boar and a preparation method thereof and relates to the technical field of the feed and the preparation method thereof. The feed is prepared from the following raw materials: corn, bran, bean meal, fish powder, soybean oil, clam shells, dry sheep manure, beef liver powder, male silkworm moth powder, compound vitamin, compound trace elements, compound amino acid, fallen apple leaves, citrus pomace, actinolite powder, morinda officinalis, semen cuscutae, cistanche deserticola, astragalus membranaceus, semen allii tuberosi, fructus psoraleae, Chinese yam, dogwood, poria cocos, rhizoma alismatis and liquorice. The pig feed provided by the invention has the advantages that not only are high-quality proteins, vitamins and minerals contained, but also the energy needed by self growth need, semen generation, mating activity and the like of the boar are provided, the palatability is good, and the digestion is easy; since traditional Chinese medicines are also added into the raw materials, the boar can keep good appetite and sexual desire, and the quality of semen and the fertility of the boar can be improved.