The invention discloses a water purifier with a cleaning device. The water purifier comprises a shell, an upper filter element, a lower filter element and a base, wherein the upper filter element and the lower filter element are arranged in the shell, coaxial and connected, and the base is arranged below the shell and connected with the shell; the exterior of the upper filter element is provided with an elastic cleaning device jointed with the upper filter element; the upper filter element comprises an outer filter layer, an inner filter layer and a filter body arranged at the bottom of the inner filter layer; the lower filter element comprises a shell body and a filter material arranged in the shell body; the bottom of the shell body is provided with a water outlet, and the water outlet is connected with a water outlet pipe on the base; the top of the upper filter element is provided with a connecting post, the connecting post extends out of the shell through a through hole at the top of the shell, and the top of the connecting post is provided with a detachable rocking handle; a sealing ring is sleeved on the connecting post, and the sealing ring is positioned between the top ofthe upper filter element and the inner surface of the top of the shell; and the base is provided with a blow-off pipe and a water inlet pipe, and the water inlet pipe is positioned between the inner wall of the shell and the elastic cleaning device.