Domestic sewage disposal device and treatment method thereof

The invention relates to a domestic sewage disposal device and a treatment method thereof, which can be specially used for domestic sewage disposal, especially for comprehensive sewage disposal of rural area, subdistrict of city, restaurant and hotel. The device comprises a filter sand setting oil-separating tank component, a biological anaerobic system component and a multi-stage filter system component; wherein, the filter sand setting oil-separating tank component is connected with a domestic waste water pipe, the filter sand setting oil-separating tank component is connected with the biological anaerobic system component by a water pipe, and the biological anaerobic system component is connected with the multi-stage filter system component by the water pipe. The invention has the advantages of continuous and stable operation of sewage, ecological protection of discharge and automation control of emission.