The invention discloses a carry-on air washer. In an assembly of a machine housing, an air inlet, an air filter layer, air inlet pipelines, initial air, an air suction fan, a groove in the bottom of the housing, a washed pure air output hole, a power supply, washed pure air, a battery, an electric wire, a pipeline for outputting air, and a mouth-nose suction mask, the groove is formed in a housing bottom plate of the washer; the air filter layer is arranged on the upper surface of the housing bottom plate; one air inlet pipeline and one initial air inlet are arranged on the side surface of the lower half part of the housing or each surface; the outermost surface of the air inlet is provided with the air filter layer; the air suction fan is fixedly arranged inside the air inlet; a water pump is mounted inside the machine housing; one or a plurality of liquid atomizing spray heads are mounted inside an air liquid atomizing washing room; the air output hole pipeline is mounted at the top end of the machine housing; the air filter layer is mounted on an air output hole pipeline head; the air suction fan is fixedly arranged inside the air output hole pipeline head; and the mouth-nose suction mask is mounted at the tail end of an air conveying pipeline.