Domestic sewage treatment equipment in severe cold area

The utility model discloses domestic sewage treatment equipment in severe cold areas. The domestic sewage treatment equipment comprises an equipment body, a heat preservation layer, an equipment chamber and a reaction chamber, the equipment chamber comprises an air inlet pipe connected to the two ends of the equipment chamber, an exhaust pipe and a fan communicated with the air inlet pipe. The reaction chamber comprises a plurality of first sewage pools and second sewage pools which are alternately arranged, the air outlet end of the fan is connected with a first air outlet pipe and a second air outlet pipe, and the exhaust pipe is communicated with an air outlet of the reaction chamber. When the second air outlet pipe is closed and the first air outlet pipe is in ventilation connection with the plurality of first sewage pools, aerobic reaction can be carried out in the plurality of first sewage pools, and anaerobic reaction can be carried out in the plurality of second sewage pools; when the first air outlet