A maintenance method for a water purification device of a water-purifying washing machine and a water-purifying washing machine. The washing machine comprises: a washing drum, a circulating water pipeline, a drainage pipeline, and a membrane module. The membrane module is provided with a water inlet (1), a water production outlet (4), and a sewage outlet (3); the membrane module is connected to the drainage pipeline by means of the sewage outlet (3); the membrane module is also provided with a flushing inlet (2) through which water can enter for cleaning the membrane module; and the flushing inlet (2) is communicated with the water inlet (1) of the washing machine. The maintenance method for the water purification device comprises: a water purification device receives a water-purifying command; control washing water to enter a membrane module; and the water purification device stops water purification after running for a cycle, and controls the washing water to enter the membrane module. The technical solutio
