The invention discloses a breeding sewage treatment device which comprises a sewage collection tank, a biological power generation device, a sewage purification device and an alarm, wherein the biological power generation device comprises a biological power generation tank; the biological power generation tank is internally provided with a storage battery, a voltage sensor, a first circulation pump, a group biological battery, an adjusting valve for adjusting flow, and the like; the sewage purification device comprises a primary filtering tank, a secondary filtering tank and a sterilization tank; the sterilization tank comprises a sterilization pump, a disinfectant tank, a chemical conveying tube, a spraying device, a second circulation pump, a funnel and the like. The sewage flow can be precisely adjusted through the flow adjusting valve, then the microorganism power generation efficiency is ensured, sewage inside the sterilization tank is vertically sprayed, a disinfectant is transversely sprayed through atomization nozzles, the sewage can sufficiently contact the disinfectant when the sterilization tank has a relatively small amount of sewage, the sterilization efficiency is high, the sewage can spirally flow through the funnel with threaded patterns inside when the sewage level in the sterilization tank is relatively high, sewage disturbance is enhanced, and the sterilization efficiency is improved.