Water circulation system of full-automatic cleaning machine

The utility model discloses a water circulation system of a full-automatic cleaning machine. The water circulation system comprises a steam inlet, a water inlet, a first heater, a first spray head, a clear water tank, a first filter, a first circulating pump, a second spray head, a sewage tank and a sewage pump, the steam inlet and the water inlet are connected to the first heater through pipelines, the first heater is connected to the first spray head through a pipeline, the first filter is arranged beside the clear water tank and connected with the clear water tank through a pipeline, and the first circulating pump is connected with the first filter through a pipeline and connected with the second spray head through a pipeline. The second spray head is arranged on the other automatic cleaning machine body and is positioned above the sewage tank; the sewage tank is connected with a sewage pump through a pipeline, and the sewage pump is connected to a sewage treatment pool through a pipeline; according to the