Synergistic treatment method for domestic sewage, sludge and animals died of illness

The invention relates to a synergistic treatment method for domestic sewage, sludge and animals died of illness, which comprises the following steps: carrying out pyrohydrolysis treatment on the sludge, mixing the treated animals died of illness with domestic sewage for pulping, and mixing the sludge and the treated animals died of illness, performing hydrocyclone separation on the mixed solution to obtain overflow liquid and underflow liquid, fermenting the overflow liquid to produce acid to prepare a carbon source, performing efficient anaerobic digestion on the underflow liquid to produce biogas, dehydrating biogas residues to prepare nutrient soil, and mixing the dehydrated liquid with inflow water of a sewage treatment plant to be treated together. Compared with the prior art, steam waste heat generated after sludge pyrohydrolysis can be fully utilized, a large amount of pulping water can be saved by applying sewage and animals died of illness to pulp, no new treatment station for animals died of illness