Rural sewage treatment system

The invention relates to a sewage treatment system, particularly to a rural domestic rural sewage treatment system, which comprises a pretreatment device, an algae pond and an artificial wetland device which are sequentially communicated, wherein the pretreatment device comprises a magnetic flocculation unit, an anaerobic reaction unit and an ozone oxidation unit which are sequentially communicated. According to the rural sewage treatment system, the magnetic flocculation unit, the anaerobic reaction unit, the ozone oxidation unit, the algae pond and the artificial wetland device are combinedfor use, macromolecular organic pollutants can be removed and degraded through the pretreatment device so as to effectively avoid wetland blockage, the algae bacteria in the algae pond can remove nitrogen and phosphorus, the water treated by the algae pond enters the artificial wetland device, and the artificial wetland device realizes effective degradation of pollutants through the synergistic nitrogen and phosphorus rem