The present disclosure relates to a self-circulating flocculation washing machine and a control method. The self-circulating flocculation washing machine comprises an outer barrel, a clothes washing structure arranged in the outer barrel and a flocculation water treatment device arranged outside the outer barrel, and the flocculation water treatment device comprises a flocculation container for performing flocculation treatment on water drained from the outer barrel; the washing machine is also provided with a circulating pipe for driving washing water in the outer barrel to perform self-circulation from bottom to top; one end of the circulating pipe communicates with a self-circulating water outlet in the lower part of the outer barrel, the other end of the circulating pipe communicates with a water outlet of the flocculation container and a self-circulating water inlet of the outer barrel through a tee joint, and a non-return structure for preventing the flocculation water from reflowing is arranged between
