The invention discloses pig mixed feed and a preparation method thereof. The pig mixed feed is prepared from corn, sorghum, wheat bran, soybean cakes, fish meal, monocalcium phosphate, sunflower seeds, celery roots, pleurotus nebrodensis, cushaw squashes, crabapples, black sesame, vitamin premix and microelement premix. The preparation method of the pig mixed feed includes the following steps of crushing, blending and pelleting. The pig mixed feed and the preparation method have the advantages that the feed contains medicated additives with the insect killing and repelling effects, the resistance capability of pigs can be enhanced, the advantages of being short in treatment course, good in curative effect, free of drug residues, low in cost and price and the like are achieved, the medicated additives and other feed raw materials are matched and interact, parasitic diseases of the pigs can be treated, and the nutritional requirements of the pigs can be met.