The device comprises a box body, a cavity is formed in the bottom face of the box body, a water tank is fixedly installed on the upper portion of one side of the inner wall of the cavity, a water outlet piece is connected to the bottom face of the water tank, and a transverse plate is fixedly installed on the upper portion of one side of the outer surface of the water tank. A scrubbing assembly, a water absorption assembly and a drying assembly are sequentially arranged on the bottom face of the transverse plate according to the distance from the water tank to the bottom face of the transverse plate, the scrubbing assembly comprises a roller brush, and the water absorption assembly comprises sponge. By arranging the box body, the water tank, the first water outlet pipe, the second water outlet pipe, a valve, a spray head, a transverse plate, a first electric telescopic rod, a U-shaped plate, a roller brush, a first motor, a second electric telescopic rod, a vertical rod, a cleaning plate, a sponge, a connecting rod, a hollow box, a second motor, fan blades and an electric heating pipe, the deck can be cleaned while being cleaned; and sewage remaining on the deck after scrubbing is automatically and rapidly cleaned, and the trouble of subsequent manual cleaning is avoided.