Sewage tank assembly and scrubber

The utility model relates to a sewage tank assembly and a scrubber, the sewage tank assembly comprises a tank body assembly, the tank body assembly is provided with an opening and a water inlet, the tank body assembly is provided with a liquid storage cavity, and the opening and the water inlet are communicated with the liquid storage cavity; the upper cover assembly is arranged on the box body assembly, the upper cover assembly is located at the opening, an air exhaust hole is formed in the upper cover assembly, and the air exhaust hole communicates with the liquid storage cavity; and the liquid level control assembly is arranged on the upper cover assembly, the liquid level control assembly can move in the liquid storage cavity, and the air exhaust hole can be opened or closed when the liquid level control assembly moves relative to the liquid storage cavity. The liquid level control assembly is arranged to control the liquid level of sewage on the liquid storage cavity of the box body assembly, the liquid