The invention relates to feed, particular to feed for swimming crabs. The feed is prepared from raw materials as follows: shrimp meal, fish meal, bone meal, silkworm chrysalis meal, marine animal protein hydrolysate, cuttlefish paste, shrimp shell meal, seaweed meal, soybean meal, peanut meal, corn flour, wheat flour, sugar, squid viscera meal, fish oil, soybean oil, soybean phospholipid meal, choline chloride, decavitamin, compound minerals, monocalcium phosphate, an ecdysone premix, immunopolysaccharide, an antibacterial peptide, bacillus, lactobacillus, non-starch polysaccharide enzyme, strepogenin, a phagostimulant, an antioxidant and a mildew preventive. The feed has balanced nutrition, is antibacterial and meets feeding habits of the swimming crabs, mutual killing of the swimming crabs due to insufficient feed, molting period or overlarge group is avoided, the swimming crabs cannot cross over ponds to escape, the crab incidence rate is low, the survival rate is high, the growth speed is high, and the individual weight of the swimming crabs is higher than that of wild swimming crabs.