The invention discloses a household air purifying device. The household air purifying device comprises a frame body, an air inlet device, a rotary device, an air outlet tube, a first filter device, a second filter device and a water inlet tube, wherein a first through hole, a second through hole, a first filter screen and a sealing ring are arranged on the frame body; the air inlet device comprises the air inlet tube, an air blower and an air valve; the rotary device comprises a bracket, a motor, a rotary shaft, a rotary block, a filter ring, a first filter board and a second filter board; the first filter device comprises a body, a sealing block, a second filter screen and a third filter screen; the second filter device comprises an inclined plate, a filter vertical plate and a connecting plate; a fixing block which is horizontally arranged is arranged on the water inlet tube; the right surface of the fixing block is fixedly connected with the inner surface of the frame body; the left end of the fixing block is fixedly connected with the water inlet tube. The household air purifying device can be used for sufficiently purifying air in a room, is good in purifying effect, high in purifying efficiency and capable of quickly purifying air in the room, so that excessive polluted air is prevented from being absorbed, and the body health of a family is protected.