A washing machine comprises a water-containing barrel, a flocculation container and a filtering container that are successively brought into communication in a loop; the flocculation container is provided with a stirring mechanism and a washing mechanism; a rotatable filtering mechanism and a filtering and self-washing mechanism using water intake current to spray and clean the filtering mechanism are provided in the filtering container. When the washing ends, water is discharged into the flocculation container, and after the flocculation processing, the water is discharged into the water-containing barrel of the washing machine for rinsing after being filtered by the filtering container, and the processing procedure is circulated until the rinsing is completed; during the last rinsing processing, the flocculation generated in the circulated water flocculation processing is controlled to be discharged and the rinsing is completed.