Washing machine and control method thereof

The invention provides a washing machine and a control method thereof, relates to the technical field of washing machines, and aims to solve the problem of relatively large water consumption of washing machines in related technologies. The washing machine comprises a box body, an outer barrel, an inner barrel, a steam generation device, a first pipeline, a second pipeline and a water suction pump,the outer barrel is arranged in the box body, and a water suction port communicated with the interior of the outer barrel is formed in the outer barrel; the inner barrel is arranged in the outer barrel, and a gap is formed between the inner barrel and the outer barrel and communicated with the water suction port; the steam generation device is provided with an inlet and an outlet; the first pipeline is connected between the inlet and the water suction port; the first end of the second pipeline communicates with the outlet, and the second end communicates with the interior of the outer barrel;and the water suction pum