Rural rainwater and sewage split-flow treatment integrated device

The utility model discloses a rural rainwater and sewage split-flow treatment integrated device which comprises a primary treatment system, a secondary biological treatment system and a rainwater and sewage treatment system, wherein the primary treatment system comprises a grating and an adjusting tank, the adjusting tank comprises a surpassing pipeline and a sewage lifting pump, and rain sewage exceeding the designed flow in rainy days can be shunted into the rain sewage treatment system through the surpassing pipeline to be treated; the secondary biological treatment system adopts anaerobic, anoxic and aerobic AAO processes; the rain sewage treatment system comprises a middle water tank, a rapid percolation tank and an ultraviolet disinfection tank. According to the utility model, rain sewage exceeding a designed flow rate in rainy days is shunted to the rain sewage treatment system for treatment, so that water environment pollution caused by direct discharge of the rain sewage and ineffective loss of micro