The invention discloses a household high-purification water purifier. The water purifier comprises a water purifier body and a purifier back plate; a control panel is movably connected to the position, located at the top of the water purifier body, of the upper part of an indicator lamp position; a display is fixedly connected to the position, located at the top of the water purifier body, of themiddle of the control panel; the position, located on one side of the indicator lamp position, of one side of the middle of the water purifier body is movably connected with a power input port; the position, located on one side of the lower part of a lifting hook position, of one side of the middle of the purifier back plate is movably connected with a water inlet; the position, located on one side of a water flushing port, of one side of the purifier back plate is tightly connected with a washing water port; a booster pump is fixedly connected to the position, located on one side of the lowerpart of a reverse osmosis membrane filter element, of the lower part of a rear activated carbon filter element; and a decompression pump is tightly connected to the position, located on one side of the lower part of the reverse osmosis membrane filter element, of one side of the booster pump. The household high-purification water purifier has the advantages of being high in applicability and suitable for being popularized and used in all families, units and schools.