Automatic hand washing device and washing method thereof

The invention relates to an automatic hand washing device and a washing method thereof, belongs to the technical field of sanitary protection tools, and solves the problems of incomplete cleaning andcross infection of a hand washing mode in the prior art. The automatic hand washing device is provided with an inner cavity and a shell to form a storage cavity for storing a disinfectant; a pluralityof spray heads are mounted in the inner cavity, so that the disinfectant can be atomized and sprayed out; a foot switch or a sensing device is arranged to trigger the hand washing action, the plurality of spray heads are evenly distributed on the inner surface of the inner cavity in an array mode, after the hand stretches into the disinfection device, the hand washing action is triggered and started, the spray heads are controlled to spray the disinfectant, after hand washing is completed, waste water is gathered through a backflow groove and then discharged from a water outlet of a rear cover, and environment polluti