Distributed small rural domestic sewage treatment equipment and treatment process

The invention provides distributed small rural domestic sewage treatment equipment and a treatment process. The distributed small rural domestic sewage treatment equipment mainly comprises a collection tank and biological filter box equipment, the collecting tank is mainly used for collecting and adjusting effluent of a septic tank and kitchen sewage, and is also used as an anaerobic and denitrification place; the biological filter box equipment is composed of an outer shell, a biological filter material, a phosphorus removal filter material, a water distribution pipe network and a water collection pipe network; according to the equipment, a mode of directly ventilating and supplying oxygen to the filter material is adopted, and compared with a mode of firstly dissolving oxygen in a water body and then supplying oxygen to microorganisms in deepwater aeration of a traditional process, the energy consumption is low, and the oxygen conduction efficiency is higher. Meanwhile, by means of the mode that natural win