Nitrification and anaerobic ammonia oxidation coupled urban sewage treatment device

The invention relates to the technical field of sewage treatment, in particular to a nitrification and anaerobic ammonia oxidation coupled urban sewage treatment device which comprises a base body, a liquid inlet pipe, a liquid outlet pipe and a sludge return pipe, a nitrification tank and an anaerobic ammonia oxidation tank are arranged in the base body, and the input end of the sludge return pipe is located below a suspended filler module. The output end of the sludge return pipe is arranged at the liquid inlet end of the nitrification tank, and the output end of the sludge return pipe and the liquid inlet pipe are positioned above the suspended filler module. Nitrification and anaerobic ammonia oxidation are coupled and integrated, so that the contact area of a nitrification tank and air is increased, the aeration rate is reduced, the energy efficiency is improved, meanwhile, the oxygen content of the surrounding environment of a single suspended carrier can be accurately regulated and controlled, and the