The invention discloses an expanded feed for mud fishes. The expanded feed comprises the following raw materials in parts by weight: 100-130 parts of corn flour, 10-13 parts of artemia dry powder, 10-14 parts of hawthorn fruit pulp, 5-7 parts of peasecods, 2-4 parts of elymus dahuricus, 7-10 parts of salvinia natans, 3-5 parts of orange peels, 10-15 parts of tea slag, 30-40 parts of seeds of Job's tears, 1-2 parts of kernels of red dates, 3-5 parts of soy sauce residue, 2-4 parts of sweet potato leaves, 3-4 parts of celery, 1-2 parts of zornia gibbosa, 1-2 parts of lotus grass, 2-4 parts of bitter gourd roots, 4-6 parts of water mustard, 1-2 parts of baking powder, 10-20 parts of low-gluten flour and 2-4 parts of a phagostimulant. According to the expanded feed disclosed by the invention, the digestive absorption of nutrient substances can be effectively promoted, the utilization rates of energy and protein are greatly increased, the cultivation cost is lowered, the economic benefit is improved, the emission of hazardous substances is reduced, the stability of the water quality is kept, a good water body environment is ensured, and the healthy growth of the mud fishes is promoted.