Pig feed is disclosed. The feed is prepared from following components by weight: 40-50 parts of corn, 30-40 parts of wheat, 15-25 parts of soybean meal, 20-35 parts of sweet potato residue, 2-6 parts of lactic acid bacteria, 3-10 parts of yeast, 10-15 parts of medical stone, 10-15 parts of eggshell, 10-15 parts of shell powder, 20-30 parts of silene conoidea, 10-20 parts of cottonsedge-like thistle herb, 10-15 parts of sweet potato vine, 10-20 parts of purslane herb, 3-10 parts of composite vitamin, 10-25 parts of vegetable oil, 5-15 parts of isatis root, 5-15 parts of liquorice root, 5-15 parts of milkvetch root, 5-15 parts of medicated leaven, 5-15 parts of malt, 5-15 parts of hawthorn fruit and 5-15 parts of dried tangerine peel. The feed is reasonable in formula, comprehensive in nutrition, good in taste and high in feed absorption rate. By adopting a plurality of the proper raw materials and adopting reasonable using amounts, comprehensive nutrition of the feed is optimized, and three functions, namely functions of regulating feed palatability, increasing the lean meat percentage and boosting pig immunity are achieved.