The invention relates to a weanling pig compound feed containing earthworm powder as a protein source, belonging to the feed field. The weanling pig compound feed provided by the invention contains the following components in parts by weight: 50-70 parts of corn, 15-25 parts of extruded-soybean, 5-15 parts of soybean meal, 2-6 parts of earthworm powder and 1-6 parts of lactose. The earthworm powder used in the invention is manufactured by the fresh Japanese bloodworms after being dried in the shade and crushed, which are rich in animal protein, antibacterial peptide and amino acid, and is added to the weanling pig compound feed in two stages according to a certain proportion, so that the compound feed can effectively reduce the diarrhea rate of the weanling pig and improve the growth performance of the weanling pig.