The invention discloses a simplified drainage device of a pulsator washing machine, which is characterized by comprising a cover plugging device (1), a connecting device (2) and an overflow pipe (3). The device formed by the cover plugging device, the connecting device and the overflow pipe are arranged at the position of a pipe port of a downpipe of an inner barrel to plug the downpipe of the inner barrel, and discharging of washing water in the inner barrel is controlled by promotion, demotion, opening and closing of the cover plugging device pulled by a drainage switch button and a pulling belt, and simultaneously, redundant washing water in the inner barrel is discharged in an overflowing mode through the overflow pipe, the cover plugging device and the downpipe of the inner barrel. The simplified drainage device of the pulsator washing machine overcomes the shortcomings of complicate structure, high cost, low production efficiency, many fault points, large potential safety hazards and limited application, and reduces constituting components, glue sticky sealing points and occupation space by simplifying the structure, and a drainage system of the pulsator washing machine achieves purposes of lowering cost, improving production efficiency, reducing the fault points and potential safety hazards and being common and general.