High efficiency and low consumption village and town domestic sewage treatment process

Belonging to the technical field of domestic sewage treatment, the invention discloses a high efficiency and low consumption village and town domestic sewage treatment process. The process includes the steps of: (1) pumping domestic sewage into microbial sewage treatment equipment by a water pump, and utilizing an aeration device to meet the degradation treatment demand of microbial sewage treatment equipment for COD; (2) letting the supernatant of a microbial sewage treatment equipment sedimentation tank flow into a constructed wetland treatment tank, subjecting the nitrifying bacteria sludgeflowing out together with the supernatant to nitrification further in the constructed wetland treatment tank for ammonia nitrogen degradation; and (3) letting part of the sludge in the microbial sewage treatment equipment sedimentation tank flow back into an anoxic tank by a sludge pump. The microbial sewage treatment equipment is based on the degradation of COD, and reasonably regulates the aeration quantity to reach th