The invention relates to the technical field of a livestock and poultry feed, and particularly discloses a feed containing Hermetia illucens and capable of improving growth performance of piglets. Each 1000 parts of the feed consists of the following raw materials in parts by weight: 460-480 parts of corn, 110-140 parts of soybean meal, 60-70 parts of expanded soybeans, 50-65 parts of fermented soybean meal, 30-45 parts of concentrated soy protein, 50-80 parts of whey powder, 10-20 parts of high-fat whey powder, 0-30 parts of fish meal, 10-30 parts of Hermetia illucens insect dry powder, 20-40parts of pre-digested functional peptide, 6-10 parts of calcium hydrogen phosphate, 0.8-2 parts of sodium chloride, 4-10 parts of mixed amino acid, 1-2 parts of choline chloride, 2-5 parts of zinc oxide, and 10 parts of a premix. The feed can effectively alleviate the growth restriction and diarrhea of weaned piglets by regulating the nutrient of a creep feed.