Domestic sewage treatment system

The invention discloses a domestic sewage treatment system. The domestic sewage treatment system comprises a settling pond, a residue discharging pond on one side of the settling pond, and a third channel formed in the side wall of the settling pond, wherein the settling pond and the residue discharging pond are communicated through a residue discharging valve, the inside of the residue discharging valve is provided with a valve mechanism for opening and closing the residue discharging valve, and a valve is arranged inside the valve mechanism; the inside of the settling pond is provided with ascraping mechanism for driving residues to move and a screen mesh. The scraping mechanism can push the residues at the bottom of the settling pond, when residue discharging is required, can help theresidue discharging valve discharge the residues, thereby improving the residue discharging speed and efficiency; meanwhile, the screen mesh can screen out large impurities to ease the burden of residue discharging. 本发明公开了种生活污