The invention relates to the related field of advanced environmental protection industry, and discloses a household sewage treatment barrel which comprises a barrel body, a storage cavity with an upward opening is formed in the inner wall of the barrel body, a barrel handle is movably installed at the top of the side wall of the barrel body, and the inner wall of the barrel body is movably sleeved with a supporting block. The inner wall of the barrel body is movably sleeved with the supporting block, a filter cartridge is fixed to the inner wall of the supporting block, and the floating block is installed at the bottom of the supporting block, so that after the bottom of the filter cartridge is blocked, the gravity of sewage gathered by the filter cartridge is increased, the filter cartridge is pressed downwards, airflow in the storage cavity overflows from the bottom of the filter cartridge, an air flow channel between filter cartridge and the storage cavity is dredged, and sewage in filter cartridge is filtered. Meanwhile, the floating block floats on the sewage in the storage cavity, so that not only is the filter cartridge supported, but also a user can intuitively know the storage condition of the sewage in the storage cavity through the height of the floating block jacking up the filter cartridge, and finally, the purposes of anti-blocking filtering and sewage storage warning are achieved.