Method and system for decentralized collection and treatment of rural domestic wastewater

The invention discloses a method and a system for decentralized collection and treatment of rural domestic wastewater, which belongs to the field of wastewater treatment. The system comprises a decentralized rural domestic wastewater collection system and a decentralized rural domestic wastewater treatment system, wherein different areas are divided for decentralized rural domestic wastewater collection according to rural specific topographical characteristics, and original main canals and branch canals are utilized to collect wastewater into a wastewater pool for storage; the wastewater in the wastewater pool is periodically treated by the decentralized rural domestic wastewater treatment system, and is lifted to a fixed mode or vehicle-mounted mode integrated unit (comprising a primary sedimentation tank, a sand filter, an anaerobic tank, a contact oxidation tank and an inclined tube sedimentation tank) by a lift pump reserved in the wastewater pool, a large quantity of organic matters in the wastewater, su