The invention discloses a household water purifier and relates to the technical field of water purification equipment. The household water purifier is characterized in that a waste water proportioner is connected with a discharge pipe, a water inlet pipe is connected to the lower end of a flushing solenoid valve, a water inlet solenoid valve is arranged on the water inlet pipe, a PP (propene polymer) cotton filter element is arranged under a mounting seat, a granular activated carbon filter is arranged beside the PP cotton filter, a composite filter is arranged beside the granular activated carbon filter, a booster pump is mounted above the mounting seat through a bolt, a low-tension switch is arranged at the water outlet end of the booster pump, a controller is arranged beside the booster pump, an oxygen-enriched water generator is arranged in the rear of the booster pump, and a high-tension switch is arranged on the side face of the oxygen-enriched water generator. The household water purifier has the advantages of being small in structure and convenient in mounting and operating, kinds and temperatures of purified water can be selected as required, and use in different situations is facilitated.